Every Saw Trap Ranked From Worst To Best

Trap: A glass grinder was firing out pieces of broken glass at high speed towards Peter Dunleavy (Patrick McManus), a cop who'd killed a witness years earlier. The trap was testing if Ezekiel Banks, who'd turned Peter in, to see if he could forgive Peter and save him. Ezekiel tried to, but failed to locate the key and unlock the device before Peter bled to death from the lacerations.

All in all, this was a very good scene.

It's not exactly creative or particularly gruesome, but that's absolutely fine. It's a tense set-piece that tests the film's protagonist in an interesting way and that's far more important than the blood and guts. It's a shame some of the other Saw films (i.e. the bad ones) didn't realize that.