Plot hole: Near the end, at the assembly, the old lady sitting on stage can't even lift the turkey. But about 90 seconds later, she's running away from the can pyramid. What a miraculous recovery.
Revealing mistake: Right after TJ and friends are looking at the "thermometers" of cans, the Ashleys have at least 4 crates of cans that they bring in on forklifts. However, the end result is 4,362 cans for the Ashleys. This may seem kind of picky, but I think there was more cans than 4,362.