 Sadly, one of the other things he hallucinates is that he can fly.He being a wizard, this is relatively easy to deal with; the other faculty members simply have to keep him from flying higher than the walls.Hex temporarily inherited the Bursar's condition after having a ""conversation"" with him, until Archchancellor Ridcully remedied the matter by convincing the ant-run thinking engine it had just been administered "LOTS OF DRYD FRORG P¼LLS".