Here's a good one:
My parents were away this weekend and there was only me and my older brother at home. So it's like 4:30 AM, I go to bed. Soon after, I hear him coming back from a party and going off to bed, too.
I wake up yesterday morning and when I go down to the kitchen to grab breakfast he says: "Hey did you hear loud noises last night coming from my room?"
"No, why?"
"Just wondering... 'Cause there's a foot-wide hole in my wall and I don't remember anything after going to bed."
Now our parents want to know why we had a party at our place while they were gone... which we didn't... Also here's the weird thing: The solid part of the wall that was punched through is like an inch thick and there are fist marks imprinted on the pieces that were left behind. It would've taken repeated punches to get that hole done and the one who did it would obviously feel some kind of pain in their hand the next day. Plus, why did no one wake up? So either I got up (I don't sleepwalk, so that's unlikely), went down to his room, pushed his alarm clock aside and punched a hole in his wall (without waking him up). Or he did it without making any noise...