While changing a bulb over the stairs we dropped one of those "new" bulbs , with mercury; it broke, we swept it up knowing not to vacuum it, at put it in a ziplock bag. All windows were opened...is there any thing else we have to worry about? Oh, while picking up a very small shard, it pricked my finger, which bled quite well like when you have a needle prick..washed it and pressed it more to bleed out well. Paranoid, I know! Anything to worry about?