Middlesex Panthers crashed to a four-wicket loss against Glamorgan Dragons at Richmond after being put in a spin by the visitors.
Veteran slow bowlers Robert Croft (3-18) and Dean Cosker (3-11) took advantage of a low, slow wicket to take three wickets apiece as Middlesex were bowled out for 102 in 19.1 overs - their lowest ever Twenty20 total.
Opener Chris Rogers, with 30, was the only batsman to make a contribution of note in a disappointing effort.
Glamorgan's run chase was not entirely plain sailing; they slipped to 30-3 in the fifth over as seamer Ryan McLaren (3-7) made inroads.
Dragons skipper Alviro Petersen had initially stood firm with 39 from 32 balls but his dismissal, bowled by opposite number Neil Dexter (2-26), left the match back in the balance with 44 still required.
Mark Wallace, however, guided Glamorgan across the winning line from the first ball of the 17th over with 40 not out from 41 deliveries.
The Welsh county are now up to fourth in the South Group after their second win of the campaign, while Middlesex have lost four out of five and are second bottom.