For your amusement today, I offer the Princess and the Pea Alarm Clock.
First the explanation from the inventor, jmsaltzman:
No ordinary alarm clock: the Princess and the Pea Alarm Clock ("PPAC") leaves no room for snoozing, inflating a green "pea" between the mattress and box spring, making it impossible to stay in bed. In the tin can, a homemade Arduino-compatible board with clock and memory chips handles the alarm clock functions, and a power block under the night stand provides power and relays driving the sprinkler valve or other alarming alarm functions.
And might I say it really does look like a giant pea once it is inflated. And here's another video with Saltzman in the bed, but the pea is invisible...