get all.coins
You get 11 copper coins.
No one is around to take coins from you!
You get 2 silver coins.
No one is around to take coins from you!
You get 3 copper coins.
No one is around to take coins from you!
You get 2 silver coins.
No one is around to take coins from you!

This may not actually be unique to goblin mounts; normal mercs may trigger it as well.

Expected: same as above, but without the "No is around to take coins from you!" echo. Just as if I'd done "get all.coins" without having a mount or merc present in the room.