When I was test driving the car I bought for my first one (a Datsun 200SX), we came upon a stop light on an incline. I was nervous about taking off as, while I had driven a standard, I wasn't use to it and wasn't sure how much time I needed to get my foot from the brake to the gas pedal to avoid the roll back. Plus, the guy behind me was a little closer than I'd have liked him to be. So...I let the guy in front of me go, then quickly let off the brake and pretty much floored it! My dad, in the front seat, chastised me while the salesman in the back seat thought it was funny.
I'm surprised the idiot behind me didn't honk while waiting the 2 or 3 seconds for me to let the car ahead of me get away.