Jersey stunned host UAE by 35 runs to claim their second win at the T20 World Cup Qualifier.
Ben Ward hit 47 from 24 balls as they recovered from a slow start to set UAE - ranked 11th in the world - 148 to win in Abu Dhabi.
UAE then slumped from 60-0 to 112 all out - with the first three wickets falling to 18-year-old Harrison Carlyon - as Neil MacRae's side side secured a famous victory.
The result sees them climb to second in Group B and strengthens their hopes of reaching a first ever World Cup.
Ward - whose innings at College Field in Guernsey helped Jersey get to the UAE - struck four sixes to give them something to defend.
Carlyon then produced the breakthrough with the ball, finishing with 3-15 from his four overs as his side strangled the run chase.
Jersey face Hong Kong tomorrow - live on television - knowing victory there would put them in a strong position to get out of their group.
They still have games against Ireland and Oman to come later this week having beaten Nigeria and lost to Canada in their opening fixtures.
The two group winners earn automatic qualification to next year's World Cup in Australia, with the next three from each playing off for four more places.