This was just too odd to no post up. The author basically takes a haloween arm prop, puts it on a motor that spins around above her head when the alarm goes off. Its affective, as long as you have short hair (her hair gets bound up in one of the demos). I think the car alarm one would be a better solution.
http://www.ubergizmo.com/2015/11/alarm-clock-slaps-awake/?utm_source=mainrss