Slap the Crap Out of Me Alarm Clock
People have been trying to improve the alarm clock for years. Not sure if this alarm clock invention is the answer, but it sure would wake you the hell up in a big hurry.
A YouTuber built an alarm clock that wakes you up by slapping you in the face over and over and over again till you finally wake up and turn it off.
It looks like it would definitely wake you up, but it needs a few tweaks. Because the third time she tries it, her hair gets tangled in the motor.
(Warning: The link to the video contains uncensored profanity)