Angus' story reminds me of what happened to my niece once upon a time, tho the only similarity is that glass was involved. She was a young girl at the time (late 70's, maybe early 80's) and took a bite out of a McDonaldland glass (Hamburglar if I remember correctly). No cuts, no injury, just a single bite shaped piece of glass we got her to spit out before she came to any harm. For some reason, that was the last time our family used those glasses.
My mom told me that when I was a toddler, I flushed a bunch of McDonald's happy meal toys down the toilet after I got mad at her for taking my Elmo Saves Christmas video away. We needed a plumber to come out XDD