The room goes dark, except for the glow of the dead mans light. The madman lets out a mighty roar and charges the pipe you're in. In the darkness you fumble with the slingshot. You might not get a shot off in time. Do you have a back-up plan, or will this be the end?
In the darkness, his footsteps grow nearer. You know you can't fight him by hand since he's armed with a knife. If you throw your items down in front of you to trip him, you might still have to wrestle for the knife. You need to take him out or trick him. The wrenches are in the hobo sack along with the door knob and there's no time to remove them. You think about feeling your way back to the large junction (92) but relize once you reach the end, there's no room in the pipe for you to step aside and trip him. Are you still going to trip him with your items and fight him risking injury, try some other way to slow him down to buy more time, jump in the water at the end of the pipe you're in, try something different or die? You can use your items and trip him to slow him down but you need to do more.
You decide to feel your way back to the large junction. You really don't have a complete plan worked out, so you throw your items down to trip him. This will give you several more seconds to work out your next move. Remember, he can't see where he's going and you've been at the end of this pipe before. Are you going to jump and get trapped or do something to save you?
Oh!!!!! I know what one it is now, since you have no items go back to the juction, and shimmy to the northen pipe, to come after you he has to drop both items, and he might not know where you went, if you have any items THROW them into the water to make him think you jumped down, its a last chance kind of thing.