i had a bad experience the other day. I was doing a hour and a half session which i do alot i did a flavor change halfway through from AF Melon to AF Apricot which i had never tried but the date and the smell was all good. i did everything the same as always but i got a headache on the apricot. i figured it was a normal headache and maybe i didn't let the coals light fully. then later in the car i just started throwing up. good news i felt way better after but bad news is my car still smells like vomit.