Turns out, musical talent does not go hand-in-hand with grace or balance.
Sir Elton John was attending some fancy tennis competition called the Statoil Masters at London's Royal Albert Hall and could not contain his excitement long enough to stay seated in an upright position in his chair.
The moment is made only more cringeworthy/enjoyable by a reporter who does a post-fall followup interview with the very frazzled music legend.