Dube Egwuatu was buying a mobile telephone top-up card in an off-licence when the gunman confronted him and glared at the top, which carries an image of the Democrat US 
presidential candidate underneath the legend 'Believe'.
The man then launched into a tirade of racist slurs, shouting 'I f***ing hate n*****s' and urging 36-year-old Mr Egwuatu to leave the shop with him.
The man then left the shop but when Mr Egwuatu re-emerged, the attacker was waiting for him in broad daylight with a threatening-looking dog and holding a gun behind his back.
Realising what had sparked the increasingly violent assault, the terrified Mr Egwuatu zipped up his jacket to cover the image of Mr Obama and walked to his car.
But the shaven-headed man, who was white, followed Mr Egwuatu and after pulling open the passenger door pointed the gun at him.
After pleading with the man to leave him alone, the married former street warden put the keys in the ignition and turned the engine on.
The attacker then fired the gas-powered ball-bearing pistol three times, hitting the civil servant in the face, hand and shoulder.
Fearing for his life and bleeding heavily, Mr Egwuatu raced away in his car and found somewhere safe to call for help.
He was taken to hospital and later sent to have a piece of metal removed from his jaw.
Mr Egwuatu, a data analyst with Croydon Council, said: 'The venom in his voice was frightening.
'He was telling me that he was going to kill me.
'I couldn't believe it was happening - and just because I was wearing an Obama T-shirt. He was trying to make me walk somewhere quieter, saying: 'I've got something for you,' and 'I'm going to kill you.'
He added: 'Obama inspires me, his educational track record alone is quite unbelievable - that is why I was wearing the T-shirt.
'I did not think for one minute it could stir up such powerful feelings of hatred and I never said a word to him.'
Mr Egwuatu's wife, Angela, 35, said neither of them had experienced anything like it during their childhood in Nigeria.
Mrs Egwuatu, an immigration officer, said: 'At first my feelings were pure horror and now it is pure anger.
'If he had been carrying a real gun I would have been a widow. It is just ridiculous.
'I don't know how a person's mentality works. Why would a T-shirt get you to the point where you want to shoot someone.'
To the untrained eye, ball-bearing guns like the one used in the attack look every bit like a real firearm.
The potentially lethal weapons are often converted by criminals to fire real bullets, and can be bought easily in high-street shops and on websites.
The Met said it was investigating the incident, which took place in South Norwood, and that police searched a nearby house which the attacker was seen going into.
No one has been arrested.
I'm more convinced than ever the world needs to see Obama elected for so many more reasons than his detractors can produce that he doesn't.
Offers Pouring Into Student Selling Her Virginity
A Sacramento State grad is trying to make money the old fashioned way, by auctioning off her virginity to help pay for her graduate studies. And so far, bidding is up to $250,000.
The 22-year-old who is using the pseudonym Natalie Dylan for safety reasons is going through a legal brothel in Nevada to sell her virginity. "The main purpose of this is to finance a couple things in my life," Dylan told CBS13. "I think empowerment of women is picking yourself up and doing something on your own to better yourself."
Dylan says she's already taken a polygraph test to prove her virginal status, and is also willing to undergo a medical exam.
The auction will take place at the Bunny Ranch in Carson City, Nevada with bids coming in through their website. Owner Dennis Hof tells CBS13 that eBay rejected the auction, so he'll handle the entire process.
Hof says Dylan is a bright, beautiful young woman who's going to consider a number of factors in her decision because she wants her first time to be a positive experience. "Natalie is a very smart girl. All she wants to do is get her master's degree in family and marriage counseling and be a psychologist. She's selling her virginity to accomplish that," Hof told CBS13. "She's smart enough to sell it. This is empowering her."
So far, hundreds of offers have already come in including some from male virgins. Natalie says she won't give up her virginity to the highest bidder. She's also seeking other qualities from her first lover. "I'm looking for intelligence and an overall nice person," said Dylan.
Hof also says Natalie Dylan ended up in a financial bind, because her stepfather allegedly used her college status to fraudulently apply for student loans, and then ran off with the money.
Dylan earned her bachelor's degree in women's studies from Sacramento State and plans to get her master's at the school beginning in January.
Many Sac State students say they're shocked to hear about their former classmate's plan, while others applaud her.
"She's just giving it to some random person. And I just think she should be giving it to someone special she loves," said one student on campus.
While another felt that selling her virginity for grad school "is a noble reason to get money."
As for Natalie, after claiming to hold on to her virginity for 22 years (although the Bunny Ranch website claims she is 21-years-old), she says she has a commodity not many people have to sell.
"When I was younger, I wanted 100% romance, possibly even wait for marriage. But as I grew up, reality kinda hit. And I think its a capitalistic society and I want to capitalize on this," explained Dylan.
