We can't vouch for this video. It purports to have occurred in Detroit, but there's no ID on anyone or the location. It's just one of those things that flies by on Instagram, and if you don't mind a little harsh language, you should find this little bit of street justice grimly amusing.
It depicts what appears to be an act of porch piracy, foiled when a homeowner steps out armed with a very scary-looking assault rifle. The takeaway? Make sure you can trust your wheelman. Dig it: