Imho the worst stupid things to do are the ones where it's a multiplayer co-op game and your friends see it...

In Halo ODST during the mission where the entire squad is together and you're flying through the underground tunnels in the banshees I was playing with Psy and DK and well, I got lost... They both died and could see on my follow cam where I had to go to get them to respawn and to advance the mission and were yelling at me to go there but I got confused by them giving me contradicting orders, in the end they were humming the benny hill theme at my expense. I eventually landed where they told me to much to their comedic relief as I professed to having been blonde as a child and still 15+ years later getting blonde moments.