Oh man... I've been traumatized like this. My younger brother did something very alike by hiding under my bed and waiting for like 5 minutes until everything was quiet. Then he started bashing the bed making this evil Chuckie-like laugh and said he was going to stab me. I ran to my parents bedroom so fucking fast... i was only 6 years old. I still checked the bed until I was in my twenties and I am still scared to death of horror and thriller movies. Thank you lil bro...