The dumbest things I've done playing blue... The first time I played Pokémon was on my friends gameboy and he was up to the Seafoam Islands. He had nicked off into the kitchen to get something to eat and I skillfully beat a Seal with one hit from an overly powerful Pokémon. Anyways, he returned and with a big grin on my face I declare, "I killed a seal!" Proud of myself at the time, now it's a memory that haunts me.
I also managed to "kill as I put it, Mewtwo, and saved afterwards thinking him to be some sort of boss. My friend wasn't too happy about that... I think the slogan/motto of Pokémon, "Gotta catch 'em all," had escaped my knowledge at the time. :P
Weirdest thing... Nope, can't really say I've seen anything weird in my playing time.
~The General~