I used to do a lot of Panto in my early years, and have some wonderful memories of those days.As for great moment in the Theatre?
A very young Peter O'Toole's Hamlet at the Old Vic in the early 60's, about which the one critic wrote "....He may not be the best Hamlet ever, but he is surely the loudest".
Michael Redgrave in "Hobson's Choice" Also at the Old Vic, early 60's.
Oliver at the New Theatre, at around the same time.
Finally, "Orphans" in Perth Western Australia during the 80's, with Warren Mitchell, his son(can't remember his name offhand) and Colin Freils. Definitely a night to remember. Not only were the audience in tears but also the cast.
CHeers
Bugsy