Back in the Old West three Texas cowboys were about to be hung for cattle rustling.
The lynch mob brought the three men to a tree right at the edge of the Rio Grande.
The idea was that when each man had died, they'd cut the rope and he'd drop into the river and drift out of sight They put the first cowboy in the noose, but he was so sweaty and greasy he slipped out, fell in the river and swam to freedom.
They tied the noose around the second cowboy's head.
He, too, oozed out of the rope, dropped into the river and got away.
As they dragged the third Texan to the scaffold, he resisted, "Please!
Would yaw'l tighten that noose a little bit?
I can't swim!"