Floor stays level. Room rotates on the vertical axis. Floor is now a wall. Room rotates on the diagonal. Everything falls to a corner.
Floor is now ceiling.
All items not bolted down are about to take a trip. Nevvitz was prone to use this wand at late-night parties in large castles, where the damage was not quite so noticeable from normal party damage and where the occupants of the room were drunk enough that they found it amusing as well as painful. No real damage is done by their bite, but the annoyance factor to an unsuspecting swimmer is very high, akin to multiple mosquito bites. The fish revert to rubber and float to the surface when the command word is spoken. Removal from the water will also make them go dormant.