Chipmunks are a pain to me and my shop. Little guys are so quick. They like to retreat up the downspouts. I can usually flush them out and have an air rifle waiting on the other end for them. I have a feral tom cat that patrols the property. He's very good at catching and toying with them, then simply rips their little heads off.
Funny story, used to have a massive chestnut tree on the corner of the shop. Great food source for all types of varmints. It's gone now and that has helped a bunch. One spring, I was getting the Dixie Chopper ready for mowing season. Even though I'd had the battery on the charger, it seemed a little sluggish starting. 33hp Generac, 990cc, this motor will scream and if you mow at night, you can see the muffler just about glow orange. I was letting the engine warm up in the shop to change the oil and after a few minutes, it started shooting flaming hickory nuts out of the muffler. Shocked me pretty good because they were hitting the metal walls. Sounded like I was under attack. Turns out, the muffler was just about jam packed with hickory nuts.