most of the time, mr teatime seems a pleasant, albeit odd young man. however, he possesses physical abilities which defy physics, and has been known to perform feats such as stabbing through all layers of clothing but stopping before hitting flesh, doing the same thing but with eyelids instead of clothing and eyes instead of flesh, flipping on thin air, and killing so fast he appears to be a blur, all of which he will do without any notice or provocation. rumours among his associates (somewhat confirmed in the "gurps discworld" rpg sourcebook co-written by pratchett) imply that the glass eye is in fact a scrying crystal, which might go some way towards explaining his abilities but also means that he implanted notoriously erratic discworld magic "into his own eye-socket".