Because all those who can run, jump, or swim are already in the US.
Because anyone who can run, jump, or swim already left.
Juan on Juan
Halfway, any further and you're running out.
Running Stupid
First, you put the cricket on a box, tap the box, and you see that the cricket jumps away. Now, you cut his legs off, put him on a box, tap the box, and you'll see that the cricket does not jump away.
Anyone who can run jump or swim is already across the border.
Because everybody who can run, jump and swim are already in the U.S.