thats ok im quite used to it. like it too in fact(dont tell anyone...)
your friend got a good load of antioxidants which are present in raw veggies...they get destroyed by boiling or cooking......and the" high "
he felt was his toxins being drained out the system.
so yes thats normal to have..

ps i charge a hundred for internet consultations ....lol

do it right - the first time!