Use the slingshot to knock down the panties.

Wait, you do have a way to throw rocks more efficiently, that slingshot you took from the minimarket! You grab a stone, put it in the middle of the rubber band, and fire! It flies past your panties at great speed. A miss, but now you know that it´s possible to hit them.

You unleash a barrage of stone and fury towards the tree, and eventually, one of your projectiles does connect. Your panties drop from the branch …only to land on another. Your curse and crouch to pick up more stones, your **** isn´t over.

But you are already wearing bottoms, and you can´t exactly wear your panties anywhere but your crotch (…maybe? But why would you want to use them as a mask?) So you find a safe spot to hide them in. You´ll come back to them later if something happens to your current bottoms.