Roof Day - Scary

I spent 2.5hrs on the wet roof Sunday morning. The roof is a 12/12 pitch laymans terms steep as shit. One hole for vent is already cut in. I have to increase the size of that one and then cut a whole new one in. I started with the hole saw which went freaking dull after cutting thru the shingles. I had to cut it with the Jig saw (I think that is what its called) I hate it, it vibrates a LOT and I just dont feel like using it. But I had to, and I did and I looked like Spiderman up there one foot in the already cut hole and the other one perched on the adjoining roof valley. Slippery, wet, scary SUNDAY The rest of the day was spent cleaning for inspections Tuesday.