It was blood drawn from the left arm vein (the most common such draw location.) The phlebotomist was supposed to draw 8 vials of blood but couldn’t even get to 6 because of my slow bleeding.
Huh. I’ve had issues with my blood flow stopping when it’s not a clean stick, but they can usually get it started again. Sometimes i have to intentionally relax my arm for that to happen. I’ve never had anyone give up early.