Continuity mistake: When the Coyote paints the landscape when preparing his "Stop! Bridge Out!" trap, he takes away his three points of paint and hides behind the sign. But when he notices the Road Runner has ran through the landscape, there is no sign of the three pots.
Continuity mistake: When the Coyote has put on his Batman outfit, you can see behind him there is a boulder and an empty box before he is about to jump. But we see the Coyote on top of the cliff in the next, the boulder and box are nowhere in sight.