Replying to Do roofies make you shit your pants?

So we went out to a bar tonight and my roomie brought back a girl he has been hooking up with recently and she ended up getting too hammered at the bar so when she got home she went into his bathroom to do the ole puke and ended up like passing out next to his toilet and the next thing we know, she shit her pants (she was wearing spandex leggings and you could see a ball of shit in her pants and smell it).

He then called her roomie and they just came and got her and brought her back...

Is this a case of someone at the bar roofie-ing her or her just being too drunk? I have only once heard of a case of a girl shitting her pants after getting too drunk but this was back in HS.

Thoughts?