A piece in the current edition of Flyer is worth the read:
Manoeuvres that Murder:
"Brian Lecomber lists the three most dangerous aerobatic manoeuvres (you'll never guess what they are) and some tips which will stop them getting you"
"Three words which should be carved in stone: check thy energy"
Number 3? "The ultimate humble manouvre - the wing over"
albeit used incorrectly by pilots escaping from a

up manoeuvre. Unfortunately it does not seem to be available on the web site.