Scott Styris blasted a century from just 37 balls to help Sussex reach Finals Day of the Friends Life t20 with a 39-run victory over Gloucestershire at Hove.
The New Zealander plundered a single over from James Fuller for 38 runs, a figure made possible due to no-balls, in the process of compiling the third fastest ton in Twenty20 history.
Matt Prior (60) and Murray Goodwin (55) also contributed half-centuries as the Sharks racked up a fearsome total of 230-4 to effectively kill the contest off before the halfway point.
Gloucestershire did post an admirable 191-8 from their 20 overs, with Dan Housego (47) and Alex Gidman (44) the top scorers for the visitors.
Sussex made an awful start to their innings after being put into bat as openers Chris Nash and Luke Wright both fell for one in the first seven balls.
England wicket-keeper Prior led the recovery by smashing Liam Norwell for two sixes and hitting Ian Saxelby onto the roof of the pavilion as he brought up his 50 off just 28 balls.
The England wicketkeeper put on 98 with Goodwin, who played a good supporting role at the other end before accelerating to his 50 off 38 balls.
Prior's innings came to a disappointing end when he was run out attempting a quick single after being sent back by Goodwin.
Another mix-up should have resulted in Styris being run out, and Gloucestershire were made to pay dearly for missing the chance as the veteran went into overdrive, hitting a remarkable nine sixes and five fours.
The worst of the punishment reserved for Fuller's third and final over, which began with two no-balls and ended after a string of boundaries.
He reached his 50 off 24 balls and then powered to his 100 off a further 13, where he remained unbeaten at the end of the innings. Only Andrew Symonds (34 balls) and Louis van der Westhuizen (35) have scored quicker hundreds in the format.
Gloucestershire needed a miracle to have any chance of victory, but could only manage a solid start from Housego and Hamish Marshall after Benny Howell had departed early for eight.
As the innings progressed Marshall (42) edged Amjad Khan to Prior, Will Beer bowled Housego and Ian Cockbain before Gidman and Fuller added 62 off 4.1 overs.
But Gidman and Ed Young (one) were run out from successive balls and Fuller, having smashed 26 off 12 balls in a bid for redemption, was bowled by Khan to put the contest well and truly to bed.