I'll go first (duh)
One time, I was sitting on the toilet doing the doo doo and a spider came from the ceiling right in front of me, I wasn't even done and I didn't have anything to kill it with so I grabbed a stepping stool and smashed it into the ground and killed it.
Now it's your turn.
Edit: Baby Spiders hatched Inside my ceiling fan and invaded my room, needless to say I slept on the couch that day.
-
I was asleep on my cot and felt something moving around, thinking its someone trying to -blam!- with me, i try to grab what i assume is their arm. Ended up being a three and a half foot long centipede, i quickly realized what i had in my hand, and threw that bitch across the room, landed in my CO's bunk, he screamed like a woman. Passed out when we turned the lights on, i still dont know why i did that.