cheer up, everyone has bad performances... I once forgot to play a solo at a pretty big show (at least 400 people attending) and when I tried to come back in I played in the wrong key completely, got in the right key and flubbed a ton of notes and then the singer had the balls to say my name after the solo section just making the embarrassment worse.... I mean, my mom was at that one, I felt like such a wanker and that whole show was one of my all time worst, a real low point
but I played more shows and it faded after about a year.... I honestly haven't thought about it for 5 or 6 years until today when I was trying to thin of something similar that happened to me so I could give you a pep talk
this dude threw down a challenge, you decided to be really impressive and your subconscious betrayed you... if you take anything from this let it be this;
you are only as good as you are on your worst day, so don't be too quick to show off...
I'm still a bit of a smack talker when it comes to music because its hard not to be a know it all when you have a huge wealth of legit knowledge, but I definitely don't show off when I play anymore because the older I got the more frequently I would be thinking I was going to impress people and I would wind up embarrassing myself or some unassuming dude at an open jam would hop up and blow me away without trying to even though I was playing my absolute best... the worst is when you're showing off your chops and some dude just throws something down that's simple, easy to execute, but beautiful and he makes your flash sound like garbage... so yeah, I think there's a moral to this story, which is that you coulda easily answered the guy's request for something crazy by saying you would rather play music the whole class would enjoy or answer general questions about music and playing the bass -- AND once you did bomb you might've pointed out to the class that the great thing about music is that, unlike a lot of other activities in life, its not a contest