i had an antfarm in my room, i blew smoke in their airhole every time i smoked and after a few days they started making circular tunnels..like, it was a circle, no beginning or end, they would just walk in circles, over and over....that, or the didnt finish the circles..lol...it was like a "C"...i think they got lazy...plus they started eating eachother..lol, extreme munchies i guess