To make this really cool plan you will need:
A Banana (to confuse the victim)
some cheese (to lure him into the trap)
baked beans - must be of the magic variety
decorative flannel - to be decorative
thin ledge (to balance the bucket on) must be unstable
bucket - to trap the victim
aerodynamic flaps - I'm not sure why...
string - to hang the banana on
thin string - to wobble the ledge, so the bucket falls off.
The wheelbarrow man will go past all the obstacles, getting to the drainpipe, with which he will start to climb. The thin string will then snap, causing the bucket to fall on his head - trapping him.
All we need now are some aerodynamic flaps...
Oh yeah, beans will leave magical footprints...