A man is walking his dog by the canal when he comes across two guys who have dragged a geeezer out of the water and are busy administering vigorous CPR.

They're bouncing up and down on the man's chest and gallons of slimy green water gush out of his mouth. Pump-pump-pump, here comes a frog, pump pump pump, an old shoe, pump pump pump, more water...

The man with the dog runs towards them and yells: "What the hell do you two numskulls think you're doing?"

One of the CPR team snaps back: "We're trained paramedics and we know what we're doing, now fuck off!"

"You may be trained paramedics, but I'm an engineer and I can tell you that if you don't get his arse out of the water you're gonna pump the fikkin' canal dry!"

Har har!!!