Theres a marmot quest in the level 86 zone where you punt marmots and you get your own puntable marmot quest reward for completing it.
If you place the marmot underneath a player just right and you punt the marmot, you punt the player too. It's high enough to cause them to die from falling damage. Could be used for trolling, or in BGs to punt your FC super far away, and other uses.
The player punting doesn't always happen. They have to be angled juuuuust right on the marmot to get punted too.