Dude, I went through the runs thing. I was puking out black stuff that tasted like coffee grounds and spending most of the day on to toilet. I finally went to the hospital, they did a blood test, and pumped a bunch of liquids into me. The test showed nothing wrong, but I still just kept pooping out the liquid. So they gave me another huge bag and said to go home and have a lot of electrolytes. A few hours later I was back to peeing normal.
So I mean if that's what it is, it's nothing. He might feel like he's gonna die but it just passes.
--
Kiwi