@Squilliam, I thought I was the only one! But for me I checked pretty much everywhere even if there was no chance of a murderer being there I checked for spiders. I have arachnophobia.
Talking into a fan to have a robot voice. Putting your ear to a slinky because it sounds like lasers. Sliding in socks on wood floors. Moving back and forth in the tub to make a tidal wave. The list goes on...
trying to jump from the sofa to the table to the chair and back without falling into the "lava" then when u fall to the floor screaming like u r in actual lava and u r about to die.....o wait I still do that now
Used soda lids as mini shot glasses :)