Blowing up the chimney

Sam tries to enter the house through the chimney, but Sylvester chases him out by way of a stick of dynamite tied to a balloon sent up the flue. Sam quickly escapes the chimney when he sees the dynamite, then when the balloon supposedly floats away, Sam reenters the chimney, but the balloon floats back down and he's blown up.

Example of:
Chimney Entry