Let me guess...
His Uncles, brothers, cousins, roomate pulled next to a 5.0L mustang in his Focus. He hit the gas and passed the mustang (who was not aware of this "race"). He then tells how he beet a 5.0L mustang. Eventually, your freind finds out this story and thinks, well I have spent all the money, so I
must be faster than that other focus! He put 2 and 2 together (and probably got 7) and now he thinks he can beat a 5.0.