Not the dumbest thing ever, but last riding season, during a group ride, I let the clutch out while the bike was still in first.
It made the loudest and most distinct stalling sound: Ka-chunk.
Everyone turns their head to look at me like I'm an absolutely noob.
HOW LONG HAVE I BEEN RIDING AGAIN!?!?!
I feel my face heating up the inside of my helmet like a hundred degrees warmer...