"The Coffin" joke

A man is walking home alone late one night when he hears a BUMP... BUMP.. BUMP... behind him
Walking faster he looks back and can make out the image of an upright coffin banging its way down the middle of the street towards him
...BUMP,
it goes... BUMP..
...BUMP..
Terrified, the man begins to run towards his house, the coffin bouncing quickly behind him..
Faster..
FASTER..
BUMP..
BUMP..
BUMP!
He runs up to the door, fumbles with his keys, opens the door, rushes in, slams and locks the door behind him..
However, the coffin crashes through the door - its lid clapping dementedly.. Clappity-BUMP..
Clappity-BUMP..
Clappity-BUMP..
Hot on the heels of the terrified man..
Rushing upstairs to the bathroom, the man locks himself in. His heart is pounding; his head is reeling; his breath is mixed with sobs and gasps..
With a loud CRASH the coffin breaks down the door.
Bumping and clapping towards him..
The man screams and reaches for something, anything...
but all he can find is a bottle of Benylin in the medicine cabinet.. Desperate, he throws the bottle at the coffin..