In Predator (1987), prior to the final battle Dutch fashions a booby trap involving a pulley system that uses a log and what look like daggers.
At the end of the final battle Dutch finds himself in the perfect position to execution that final booby trap. However the Predator discovers the trap and decides not to enter.
Apparently Dutch uses ‘the counterweight’ (ie the log) to kill the Predator.
Can someone explain the original booby trap? What would have happened to the Predator if it walked into the the area?