Other mistake: Due to the gait of the T-Rex, its head moves rather significantly when it walks as seen throughout the movie. However when it approaches Dr. Marshall with the laser in its teeth, the laser is steady and able to pinpoint a line up his head in a very steady manner which would not have been possible.
Land of the Lost (2009)
1 other mistake - chronological order
Directed by: Brad Silberling
Starring: Will Ferrell, Anna Friel, Danny McBride, Jorma Taccone
Continuity mistake: When Grumpy jumps the chasm to chase Dr. Marshall, there's a large green bulbous plant that moves from the side Grumpy jumped from to the one he lands on. It wasn't there before.
Dr. Rick Marshall: If you don't make it, it's your own damn "vault." That's a bitch slap of truth right there.
Question: Has it been explained how all those animals (and primates) ended their lives in the tyrannosaurus rex's lair? Did all of them get there by the sand trap(s)? If so, who re-hid them after they had been walked into? Perhaps the lair was used as sacrificial grounds or execution by the primates?