Fun Fact: Joker's "knifed" smile is actually called the "Glasgow Smile"

Glad I could be here in Glasgow, home of the Glasgow Smile.

:)

Urban Dictionary- Torture method used be mafia members in Glasgow, Scotland. Typically, two one inch incisions are made at the corners of the victim's mouth. Then, further pain is inflicted upon the victim until they scream. Since the mouth has been cut, the incisions rip further alond the side of the face towards the ears.