i puked on mushrooms one time, and it wasn't because of nausea, i think i just ended up laughing so hard that i gagged and had to throw up. the last time i did shrooms they were crazy weird ones and i went running for the bathroom every 15 minutes until i just sat in the bathroom and tripped because i thought i was going to puke.
Puking while high on psychedelics can indeed be awesome. I remember one night I got extremely high on weed and drank way too much booze, and when I vomited I thought it was butterflies and I was having the time of my life, I mean I was puking but I was in absolute bliss.
im really lucky because i never puked but mind you few times i was really really close especially just after eating them like 10-20 mins after