Santa died, then all weapons continued to fire at his skeleton till the end of round ) Santa about to die: Weapons firing at corpse (look at the time):
I've noticed that too when Santa was the last one left at the end of a battle. The battle didn't end until his bones had been shot at lol
in nomine Juggus, et Brutus, et Midokius Sanctis. *makes sign of the Holy Candy Cane* requiescat in pace, Santa
This is triggered by using santa's special ability right before he dies - if timed right so he dies before the elves hit the ground the weapons will stay trained on his skeleton. Great way to distract defenses while your other troops march in unchallenged.