You've got 10 seconds to wakeup. If you aren't up by then, the Rocket Alarm Clock will blast its rocket across the room and won't
start stop beeping until you retrieve it and place it back on the launching pad. The rocket's tip is mercifully soft, so you won't have to worry (too much) about you or a loved one losing an eye. If you have a lot of trouble waking up, it sounds like a great way to train yourself to panic at the first beep of your buzzer.
The Rocket Alarm Clock will blast you awake for $30.
CORRECTION: Thanks, Netcrow. Good catch!