You pick up the half-empty perfume bottle.
It's round with an interesting texture on the glass of the bottle. The thing has one of those pump-spray type of things on the top - you don't know the name of it. When you go to spritz some of the perfume in the air to test it out, the stranger suddenly looks back and stops you with an alarmed noise.
???
Don't spray that! It'll melt your nose right off.
...You decide to pick a different weapon.