India vs England
2007-09-19
Yuvraj Singh hit Stuart Broad for six consecutive sixes in a single over during the 2007 T20 World Cup, the fastest fifty in T20I history.
Glamorgan vs Nottinghamshire
1968-08-31
On 31 August 1968 at the St Helen's ground in Swansea, Nottinghamshire captain Garfield Sobers became the first batsman to strike six sixes in a single first-class over. The bowler was Glamorgan's Malcolm Nash, experimenting with slow left-arm round the wicket as Notts pushed for a declaration. A BBC Wales camera crew, on site for training, captured the fifth and sixth sixes — and Wilf Wooller's commentary — for posterity.