You growl?
Your eyes don't glow red when you growl, do they?
Good to see you back Squire, where have you been? 
Nice avatar by the way...is the ferret wearing glasses?
Scratchit: But he's a cripple!
Blackadder: He's not a cripple, Mrs Scratchit. Occasionally saying "Phew! My leg hurts!" when he remembers to wouldn't fool Baldrick!