I had one of those flourescent bulbs go out in my bathroom last Saturday.
I took it out and set it on the counter while I replaced it with a 60W incandescent bulb.
Well.... it rolled off the counter and hit the floor.
I picked it up and threw it in the trash, not noticing it had broken.
A few hours later the cat was batting something around the floor and it caught my attention. Holy Crap!
I picked it up the broken leftover and added it to the trash.
I'm happy to say that no one in the family, visitors, nor that cat, has suffered any ill effects.
Did I mention I vacuumed it up after the fact?