Not surprising really as too many managers these days seem to lose their heads and go charging out to the ref to complain about decisions that have already gone, we can't rewind the clock and change anything. Why oh why don't they bide their time and write about it in their many column inches they seem to have or voice their opinions in press conferences?
The charge relates to O'Neill's conduct towards referee Mike Riley following the final whistle in the Premier League game at Old Trafford. The Northern Irishman was angered by the amount of stoppage time that Riley added on at the end of the 90 minutes.
'What was it? Five minutes added time? I'm sure we wouldn't have got it at Villa Park,' he said after Federico Macheda's 93rd-minute winner.
O'Neill also complained about what he saw as an unpunished foul on Villa winger Ashley Young in the build-up to Macheda's goal, as well as several earlier decisions.
'The officials also got three offsides wrong,' he said.