SayUncle took me back more than a few years with this post on Backyard Ballistics.
My friend Brad posing with the potato cannon we built more than ten years ago in New Hampshire. We’re all fatter and have less hair today. It could launch a spud a good 300 yards. Somewhere, I still have it, although it’s been shortened because it was too long to get back into the trunk for the drive home.
I had no idea, actually, that I could have been arrested driving that thing home. It’s a firearm both in Massachusetts and in New Jersey, and I did not have a license for either of those states. Moreover, because it’s not a firearm under federal law, I couldn’t claim FOPA. We carried with us a letter from the ATF saying it wasn’t a firearm, but didn’t realize that didn’t matter. State definitions vary.
Things you do when you’re a dumb college kid and assume you live in a free country where silly things like the constitution mean something.