Image via Wikipedia
Buster Keaton got the nickname " Great Stone Face" due to his lack of expression. The man gets pushed around, tossed, flung, blown away and has a house fall on him. Still, the same expression. Brilliant I tells you. While I don't recommend throwing the smiles and winks out the window (no duh) , if you were to do a slapstick heavy piece, keeping the stoic, deadpan look would make the piece ten times hilarious.
Boom. Clips. Enjoy.
I recommend watching The General and Steamboat Bill Jr. for starters.