This happened years ago back when I was still DMing 5th edition D&D for a game store. They were running some sort of event, I forget exactly what, and asked me if I could run a one shot for them. I agreed and told them that anyone who wanted to play just needed to bring any 20th level character to the table if they wanted to play.
Fast forward to the day and I've got about 10 or so people at the table ready to play. A rather high amount of people for this kind of store but I'm not exactly surprised, high level one shots generally bring a lot of people to the table. We had two clerics, a few fighters, a wizard, a sorcerer, a few multi-classes, but the star of this story brought a 20th level circle of the moon druid.
The session starts as the large party is on a ship, after a few character introductions and a bit of light role-play they're attacked by a large pirate vessel. Sailing along side of them they fired arrows and grapples at the party's ship, trying to board and take their ship. The wizard, sorcerer and one of the fighters did fine however surprisingly enough not too many other people brought ranged weapons with them so the fight was actually rather rough on them. The druid ended up shifting into an eagle and flying high into the air, circling the enemy pirate ship.
Turn two occurred and the enemy ship successfully managed to land a few grapples despite the parties best attempt to cut themselves free. Fireball after lightning bolt after volley of arrows desperately being used to fend off the invaders. That is, until it came to the druid's turn. The druid asked if they could roll a perception check to identify who the captain of their ship was. I didn't even make them roll, told them it was rather clear who it was by their clothing even from high up. This druid gave an affirmative nob before telling me the following. "In that case I would like to dive bomb the captain and... just before I reach him shapeshift into a mammoth and crash into them."
With a surprised look I simply asked for them to roll to hit, not quite expecting that from them. They rolled a 17 plus whatever bonus to attack they had as I was quickly flipping through my book, looking for the rules for fall damage. They told me the result and I quickly started rolling dice.
I had the druid take the maximum amount of fall damage the game would allow, which after rolled ended up being 79 points of damage. Not even enough damage to knock them out of the shapeshift form, much less threaten the druid what so ever. The captain on the other hand took the fall damage, the damage from the druid's charging mammoth attack, as well as damage from frigid water as the mammoth crashed them through three floors of pirate ship. The ship was splintered in half and quickly sunk along with the rest of the attacking crew. As for the druid... well, they're a druid. After basically shrugging off the damage from the fall they shifted into a dolphin and quickly returned to the allied ship as they cut away at the few remaining grappling ropes. The druid got their hero moment for the one shot and I quickly had to come up with something else to fill out some time, cause I expected that fight to take at least an hour!