Loading my P226 mags. I load the first one with bbs and put it in the gun, load the other two. Game is starting in about 1 minute. Load my mags with gas as fast as I can and hop into the game. Sight up a target and fire twice. Gun does nothing but dryfire. Realization that I only filled the two loose mags with gas, and not the one I had placed in the gun.
Second mistake: swearing loud enough for target and his team to hear me, got caught trying to switch mags, completely helpless. Done.