Hey, I wouldn't feel that bad. I went to a drag strip to race one of my co-workers who has a modded V-6 Mustang (CAI, custom exhaust), ugh I know. So we crossed paths at a local drag strip. He of course challenged me, and normally I would not waste my time racing cars that equal to my GTO in terms of performace.
Anyways we get on the line, and when it is time to light them up, I accidentally put my tranny in 6, and bam, the engine stalls, and I look like a total jerk clown.
So hopefully now, you do not feel embarassed about losing to an LS3, some of us here have suffered much worse deaths! Just be careful out there!