Glamorgan moved up into second place in Group C of the YB40 after a thrilling one-wicket win over Somerset in Cardiff.
After England pair Jos Buttler and Nick Compton had led Somerset to 222-8 from their 40 overs, the hosts almost blew it after a good start and with just one wicket left they managed to get over the line on 226-9 with just three balls remaining.
The win moved the hosts to within two points of their opponents, who top Group C, but with the Welsh side still having two games in hand yet to play.
Marcus Trescothick (0) and Craig Kieswetter (4) both went cheaply as Michael Hogan made a great start for Glamorgan with the ball.
Peter Trego rebuilt the innings with his 42, but it was the fifth-wicket partnership between Buttler and Compton that really got them going - as they hit 116 in 18 overs.
Compton went for 50 and Buttler followed soon after for a lively 67, which came off 45 balls and included seven fours and two sixes.
Hogan finished with 4-34 while Simon Jones added 2-48, and after losing an early wicket in their reply Glamorgan took control with a fine second-wicket stand between Mark Wallace and Chris Cook.
The pair put on 119 in 17 overs before Wallace went for 70 off just 57 balls, and they managed just ten more runs before Cooke followed him into the pavilion for 44.
Skipper Marcus North added 38 and Glamorgan were cruising at 195-4 until the Australian's dismissal started a huge wobble.
Five wickets fell for just 21 runs, bringing last man Jones to the crease with still eight runs needed to win and with just 12 balls left to face.
Jones proved to be the hero though as he found a gap through the covers to hit a boundary in the final over to send Glamorgan to a vital victory.