Blown capacitor question

Hi. I was just replacing a broken bulb in my florescent beam light. Its a light that locks onto the underhood of a car to light up the work area. Anyway the old bulb had broken from being dropped and i replaced it. When I turned it on the bulb lit dim then i heard a pop. I unplugged it took it apart and found a blown up capacitor. Apon disassembly I noticed one of the pins that contacts the bulb had backed out and wasnt making contact, this would mean 3 of the 4 pins was making contact with the florescent bulb. Would this cause the capacitor to explode? If so then why.