Around 9:30PM I ate a beeftacosalad that I'd picked up at the drive-thru near my residence.Granted, I haven't been eating much there lately, but I know what the shell is supposed to taste like. It tasted off for sure, but I ate it anyway. I woke up pretty early the next morning with a slight upset stomach, probably around 6AM. I went back to sleep and woke up for good around 8AM. Within the first hour of waking up, I had a sudden emergency sprint to the bathroom for what turned out to be explosive diarrhea. This happened several more times over the next hour or two, and I also had a couple of burps that reminded me about the nasty taste of that strange tacosalad shell. I'm 90% certain it was the shell. I don't know if they are supposed to be prepared any certain way, but something was definitely off about that shell.