Marajowana Allergy?

I smoke weed every day of my life and I have never experienced the reaction my best friend gets everytime she smokes a joint. She will smoke one puff, maybe two, and be completely messed up. She first goes ghost white, then her lips get extremely purple, her eyes are slits, and she starts stumbeling every where. Then after about ten minutes of this she will start to puke, and she dry heaves like crazy. She pukes about 7 times each trip. She lies wherever you may be, doesn't matter where, and you try to move her but she just can't move, and she can't talk. It's like she's paralized it's really weird. Now this only happens if she smokes a joint, and it isn't just a coincidence becuase we have done it several times, and she can smoke bongs or pipes with out any reaction, with the exception of one time we used a bong that didn't have a screen and she did it a little bit. Does anyone know why she can only smoke bongs and pipes and not joints? The only thing we can think of is that in a joint the weed touches her lips.