The best way to get this achievement is via Time Trial mode. You must choose the map "The Town - Race 3".
At the time of doing this achievement, listening to Avril Lavigne - Sk8er Boi is optional.
On start of the Time Trial you will will have to go through the course a little before you recognize him face down against the wall. (Somehow his path always goes into that wall) - You must wait by his lifeless corpse for him to respawn and then you can progress in your mobility scooter and knock him off via walking stick or brute ramming. Once he falls off, wait for him to get back up and hit the trouble maker again!
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