This causes Sam 's personality to become displaced , resulting in his assuming the identities of people he has leaped into before .
Sam leaps into Sam Beiderman , a depressed mental patient who receives shock therapy as soon as Sam leaps in .
This causes Sam 's personality to become displaced , resulting in Sam 's assuming the identities of people he has leaped into before .
Sam leaps into Sam Beiderman , a depressed mental patient who receives shock therapy as soon as Sam leaps in .