Revealing mistake: After the jailbreak, a number of reaction shots for which the shot background is the villagers in the speeding wagon, not only do they not "bounce" with the wagon, they are not even animated.
Revealing mistake: Just before the archery contest, the Elephants play their trumpet sounds. Both the times they play it, you can notice that the same scene has been used twice.
Answer: Robin Hood, while disguised as a stork, wouldn't stop shaking Prince John's hand and it was starting to annoy him. Prince John was also robbed by Robin Hood earlier in the movie so he wanted to make sure that the jewels in his rings weren't stolen again.