In this clip from Horton Hears a Who, there are 5 things that let you know that Horton is having trouble. 1. The music makes you think that something bad is going to happen. 2. The bridge is old and rickety. 3. Horton isn't keeping good balance on the bridge. 4. Horton is Nervous. 5. There is a giant pit under Horton that will kill him if he falls.