Here’s a possible input for some shenanigans:
According to players’ reports, it is possible to throw back enemy grenades by intercepting them mid-air, even Molotovs and impact grenades.
Also, bots have been reported to do that.
Therefore, I wonder if some custom matches tinkerer or CC could possibly trick two squads of bots into starting a “hot potato” fight, by throwing each other the same Molotov / impact grenade back and forth over and over until someone misses the catch, and see how long they manage to go on.