The Shaky Cap: Like a shot to the cranium!By far our strangest interface, the haptic helmet creates the feeling of shooting out the top of your head, as if you yourself were the player's shapeship in Galaga.

One vibrating motor is positioned in a knit cap at the base of the skull. A second one is place farther up on the head. By tweaking the timings and intensity, based on our original shooter interface, the user gets the feeling of a pulse travelling up from the back of his or her head.

The Helmet of Doom: Rattles ya!As icing on this strange little cake, we put our big, custom-made rumbler in this helmet, which fits over the top of the knit cap. The low-frequency shaking adds just the right kind of touch to the shooting effect--it really rattles you a little bit.

Personally, I don't fit into the helmet. My noggin is huge. But for someone with a skull a few sizes smaller than mine, I can see this being a lot of fun. It's definitely very trippy.