If you are walking in a forest in Southeast Asia and suddenly smell the scent of popcorn, don’t be surprised. You have just passed by a trail left by a bearcat. It has been found that the chemical that gives off the popcorn smell—2-acetyl-1-pyrroline (2-AP), is also found in bearcat pee. Bearcats, like other animals, leave their chemicals wherever they go to mark their territory.