Originally Posted by Tohri
Explosive device inside the seat, with a key for hard lockout. rig it to an accelerometer.
I immediately thought of a cars airbag for a seat, would be half cushy to ride on with a Gelcover, eh? Then hook it up to a $5 9v motion sensor relayed to a 12v capacitor(like what a modern camera flash uses)
I've always wanted one of these:
Motion Sensing Alarm Padlock
U-Locks can be cumbersome... Would be good for at home u-locking to a 200lb chunk of buried concrete though, hahaha.
Edit(back on topic)- Oh yea, you should definitely build another, just be sure to at least lock it up at home!