Revealing mistake: When Andy flies through the billboard from his bicycle, there is no driver in the truck the advertisement was on. You can see through the side window and mirror that no one is in the truck.
Revealing mistake: When Andy hits the pothole, - watch where the bike lands. It's almost immediately next to him. Andy pops up and says he's fine - the bike is nowhere near where it first landed.
Chosen answer: The words translated are "When you clean my room, I can't find anything. Where are you going in a hurry? The football game." Even if you can't understand a foreign language, the last word of the love song is recognizably "football".
Myridon