In the flashback, after young Shawn tapes his and Gus's legs together, he throws the tape to the side, but later in the flashback, the tape is gone.
When Shawn and Gus jump down from an upper deck to confront the inmates who are lowering a lifeboat in the water to escape, one inmate turns around, pointing a gun saying, "get the hell out of here." His lips are clearly off sync and saying something else.