Mr. Pinstripes' Phenomenal Cosmic Power Budget Rider

Here is the rule (yes, only one):

30 hp limit.

Go out, grab a riding lawnmower, and feel free to slap as much aftermarket stuff in as you want (it'll make this a bit more tolerable). I'd suggest the Subaru 360 or the Fiat 500 series, as both are nigh-uncontrollable monsters (albeit baby monsters, but still nigh-uncontrollable), and will keep your attention for most of the lap.