It's a Roomba-eat-Roomba world out there, and these two plucky floor cleaners are playing for keeps. By which I mean their drunk owners taped knives and balloons to them and forced them into combat. It's adorably dangerous!
This almost certainly is not the first time people (drunk or sober) have taped balloons and knives to Roombas, and then sent them charging at each other while screaming in the background like spectators at the Coliseum. This, however, is a particularly good battle, complete with a few close calls and a... well, I won't ruin it for you, but the outcome is satisfying.
So place your bets and add your chuckling to the list of sins you will recite to our robot overlords once their ascension is complete. In the meantime, though, this is pretty hilarious.
Skip ahead to 2:25. Things don't really take off until the second round: