Changing light bulb + it's stuck + will it cause fire? HELP.?

If circuit breaker has tripped there is not danger of fire. If the circuit is live there is the potential danger of electrocution as the filaments of the light bulb are part of a live circuit and can cause electrical shock. To remove a broken light bulb from a socket try using a potato. This should be done only when power has been removed from the circuit at the circuit breaker. Never try to remove a bulb this way with the power on. Slice potato in half and press against broken light bulb. After pressing potato against bulb just screw it out.