That might be arcing. Common naman yan pag nag plug-in ka sa outlet. Pero check if after plug-in eh nag spark pa rin (if you refer as spark as "pumuputok") so be sure na yung spark after mo i-plug eh wala na, if continuous mukhang dapat mo na ipacheck sa electrician yung wiring nyo. If nangangamoy, do the same.
If walang dedicated outlet yung ref nyo and gumagamit lang kayo ng extension, try to buy yung may switch.
If you mean may pumuputok sa loob ng ref, might be faulty na yung ref nyo.
PS. Not an expert, just based on experience.