My basement light switch on the wall has four switches that control four different ceiling lights. One of the individual switches started sparking ( I don't have a cover on it) and sizzling slightly (sounds like bacon frying) and light wisps of smoke came out of it. The other three switches seem okay. I turned off the circuit breaker and plan to replace the individual switch. Is it possible that my problem is more complicated than this simple solution? Thanks for any advice.

Could be bad switch, could be bad connection to switch.