This woman made an alarm clock that slaps her in the face

https://youtu.be/mXLzfAHl4-k

Simone Giertz says, "I built an alarm clock that wakes me up in the morning by slapping me in the face with a rubber arm. I picked apart a clock, wired it to an Arduino UNO and controlled a 165 rpm brushless DC motor through a relay."

(Thanks, Matthew!)