How about missed frequency change. We've all heard ATC trying to contact someone. I recall watching TOD disappear behind wondering why no clearance to descend. No answer from ATC so a check of the chart revealed we had missed a frequency change. We called on the correct frequency but were now way beyond normal TOD. We managed to persuade ATC to let us max rate descend as opposed to a hold to lose altitude!! Red faces but no harm ... no foul!!
