Last night, just after turning out my bathroom light fixture, which has four halogen bulbs, the 3rd light from the end exploded with a very loud noise and to our surprise we could only find a few (3-4) very small pieces of glass anywhere in the bathroom. It seems that the glass exploded the lightbulb into dust. The only thing left in the fixture was the part of the bulb you screw in and the netting that is inside of a bulb. The fixture is on a dimmer switch. Where did the glass go? What made this happen? Will this happen again if we put a new bulb in?