When Richie gets the pencil shot into his rear, he knocks over the table (which two guests are also sitting at), knocking over all the items on the table. Then Richie and Eddie fight in the kitchen, and it then cuts back to a reaction shot of the two guests sitting at the same table, only now the items on the table are all suddenly back upright and intact again.
When Richard pierces himself with his Hotel Manager badge, lots of blood comes out. We then see Eddy on his bike and then go back to Richard with no blood. This is not a goof as it is obvious that Richie has put a fresh shirt on for another try at putting the badge on, you just don't see him change it, instead of seeing him change his shirt you see Eddie on his bike.
Despite never meeting Gino before, all the guests decide to vomit on him at high velocity, that it causes him to fly out of the window and landing in the sea to drown. Which means that a group of innocent people just killed somebody for no good reason.