A few years back (1997
I think), some engineers
at Queen's University
designed and built a potato gun
. This was not remarkable
in and of itself, as this is the sort of thing that happens when design prowess
is coupled with boredom
in a higher education
When they fired the device, it apparently blasted the potato through a neighbour's fence. Minor damage, I imagine. However, the gun's booming report was mistaken by one of their neighbours for a shotgun blast, and shortly thereafter, the SWAT team raided their house.
I don't believe any charges were laid, but I suspect the "weapon" was confiscated.
(Source: the Queen's Journal, via my dim memory)