Your Druid is sneaking through the camp site and a few soldiers start walking towards her general direction.

Druid: Uhh, I turn into a tree.

DM: The camp you’re sneaking through is in the middle of an open field.

Druid: Shit. I’ll turn into a tree anyway.

Soldier: Hey, has that tree always been there?

Druid: I’ve been here for weeks.

DM: Roll to bluff.

Druid: Nat 20

Soldier: Well the tree would know better than us I suppose.