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.
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Mine isn't too bad. When I was younger I had bad eyesight but didn't get glasses yet so instead of sitting on the couch, I'd sit next to it to get a closer view of the TV. My sister copied me because she's my little sister and they do that but I guess she got crumbs or something down there because one day I sat down and a few minutes later I felt a weird sensation up my leg to notice I was sitting In a pile of ants