Just part and parcel with working with Obsidian.
Yeah, it is those little flakes that will get you! You have to constantly dump the flakes from your pad, or one or two will stick in it, and slice you, and you won't feel it and suddenly notice that there is blood on your hand.
I was doing a little knapping the other day, and I was sitting on an old igloo cooler, and I moved, and noticed a sharp pain in left cheek......
well it seems there was a flake there when I sat down
.....took a few minutes of seat picking to get it out of the seat of my pants. I hope no one was looking. Would've looked like I had a parasite problem.
Luckily it didn't cut me, just stuck me a bit. So yeah, dump them flakes, and watch where you sit.
Nice looking point, and very effective.
Wayne