Yeah it was dumb
I was determined to finish just to see what would happen to them. So heres the walkthrough for saw IV game in this order
1. fire in room B ( i guess because the guy kills himself trying to get the lights on)
2. lights room A (i dont really know why)
3. wrench in room A (to release the water)
4. hose in room B (jigsaw said to make him breath but that doesnt make sense to me)
5. hammer in room A (break glass)
6. Key in room B (open door)
then choppy cutscene.
There isnt any glitches, you just have to do it in the right order.