Peasant Railgun

In earlier editions, a similar hack was to line up an arbitrarily long line of chickens (or similarly expendable 1 HP creature) and use a combination of cleaving feats to meat-teleport from one end of the line to the other in a single round.

My favorite exploit was when a set of players realized the druid could transform into [large animal] and if taken to 0 hp, would revert to their druid form.

They immediately wanted to make a hot air balloon to drop the druid onto groups of monsters in his largest shape.