Thunder Van - S2-E1
Revealing mistake: When Max has the Thunder Van manual, Phoebe uses her telekinesis to get it back. The wires attached to the book are in the shot.
Thunder Van - S2-E1
Continuity mistake: In order to escape the van, the kids use their powers to burn a hole in the bottom of the van. The hole is different from when they make it to when they escape.
Thunder Van - S2-E1
Other mistake: The Thunder Van is claimed to be soundproof, but when Hank finished pranking the kids, Phoebe could be heard talking to Barb from inside it.