well shake out any glass that's in there, if it's just one piece and is stuck in there then obviously it can't come out and you won't get it in your mouth, but if the piece shatters or breaks (could happen just while smoking it or moving it around) and can come out, then there's a possibility you may get small bits of glass in your mouth. So you'd kind of have to check and shake the pipe out to make sure there's no glass that can get through each time you use it, as the glass may break or have tiny pieces fall off, depends on the glass too tho. Either way, get a new pipe.