Fridge Panic

Sarah's fridge lamp went out.  I went into panic mode.  I checked all the electricity leading to the fridge, all were looking okay.  I turned down the fridge to make the compressor to come on.  We checked the temperature.  All seemed okay but I was still not happy.  So I look into the bulb compartment, in view of getting a new bulb.  When I was loosening the bulb, it came on.  Maybe it was just loose all along.  So I screwed it back on and panic over.