Revealing mistake: When Philip throws the apple at Wilson from his flying car, Wilson's reaction to getting hit is slightly delayed. (00:39:09)
Revealing mistake: In the end, Phillip lands in the chair and he stops bouncing. You think he would still bounce even though the chair was soft.
Chosen answer: It was rice and he just simply dumped them on the floor because he knew he wouldn't be needing it after the wedding to throw at the bride and groom because the Professor didn't show up.