free game mechanic idea: blocking the light with my hand

[droqen]

in a first person game, in the darkness, a light shining in my face. i hold my hand up to block the headlights, occluding an awkward hand and wrist and arm shaped blob so that i can see everything else...

[droqen]

maybe the same control scheme for other objects? the empty hand. a camera. a mirror, a lens, a gun? receiver-like, the object may be placed anywhere on screen...