Continuity mistake: Before Jesse's plate is placed on the table, the salt and pepper shakers are about a width apart. They are almost touching for a while, then back to being spaced apart. (00:10:20 - 00:11:00)
Continuity mistake: When Thomas first arrives at the Clay Pits, Timothy can be seen with a train of trucks. In the next scene, they have disappeared.
Revealing mistake: Crawling through a fire cave you can see propane bottles in the background several times.