Looking for scarry or optical mirage stick on bedroom WALL MURALS.? My son is 15 and is redecorating his room he is VERY...

My son is 15 and is redecorating his room he is VERY creative and loves to play jokes on everyone,,, he asked for my assistance!
I would like to find a place that sells REALY SCARY or optical illusion as a wall mural " something that sticks to the wall", for HIS bedroom, something like at THE WEB SIGHT, MIGHTY OPTICAL ILLUSIONS.com but that are for sale.
yOUR HELP WILL BE GREATLY APPRECIATED.
thanx
I hold pine wood ceiling. What color paint...
Answers:    enjoy you tried "Fat Head"?