Jasmyn (Honolulu, Hawaii, U.s.) on 02/14/2013:
Been doing this all my life! I learnt it in the schoolyard from a classmate! If you can't force a burp, try drinking lots of fizzy drinks. View Entire Thread
Chris (St. Louis, MO) on 10/18/2006:
Just force a burp or two. This worked every time for me.