Hey,
Popping..hmm..ur ears hahaha...no really...I don't know what it could have been.....maybe because the aircraft was light..cos it was on a positioning flight...right? went i have been on the A320 the last time..on the outbound flight I was sitting at seat 2F...two rows from the front doors..never heard a popping..ont he return flight..I was sitting right next to the emergency exit..no popping either...hmm