Transphere 1992, Germans Van Eck, NYC.

Phosphorescent sphere, 10´-diameter, glows via 1,000 watt mercury-vapor black light. Visitors may stand against ball for a few seconds, then back away and look at their own silhouette cast upon the sphere for up to a minute.

 Rear-projected video of sky outside. Audio throughout room is a low chord. Gilt speaker imbedded in sphere drones "Uhhhhhhhhh, no" in artist's voice.