Lol if you focus on the others they will res the one thats downed.
Some enemies (like the gith at end of ravine) can kill off your guy if hes on the floor at the start of the fight.
*splat* good luck ressing that.
OP is ignoring both the drow in thr fight with the Beholder and the stun ray. Maybe he was lucky a few times in a row with saves against its effect? Having your guys be unable to act for a few turns is very nasty.
Also consider this: if you are outnumbered and basicly know you are going to die. What would you try to do? Take 1 down with you or spread the scratches around that they can then just heal off?