Castleford Tigers launched an astonishing comeback to win against Warrington Wolves, while there was more misery for Leeds.
Super League leaders Warrington Wolves slumped to a second successive defeat as day one of the Magic Weekend also saw crestfallen champions Leeds Rhinos on the receiving end of another crushing setback.
Wolves led 14-0 after 30 minutes against Castleford Tigers at St James' Park before the Yorkshire side hit back in stunning fashion, putting 34 unanswered points on the board.
Denny Solomona and Luke Dorn both crossed twice as Castleford built on their crushing 52-12 victory over Leeds last time out.
Tigers coach Daryl Powell said: "I thought they [Warrington] started outstandingly well. We were a little slow out of the blocks. We got some confidence 10 minutes before half-time and then our second half was superb, but the initial 30 minutes was a scary period."
Rock-bottom Rhinos slumped to a 40-8 loss against Wigan Warriors as last season's two Grand Final sides went head to head.
Leeds initially led through Kallum Watkins, but Wigan – out to avoid a third successive Super League defeat – responded with seven tries, Willie Isa setting them on their way with a brace.
Despite Zak Hardaker being sin binned for Leeds for interference Mitchell Achurch managed to cross, but the Warriors added two further scores to complete the win.
Salford Red Devils defeated Widnes Vikings 18-12 in the opening game of the two-day showpiece event, staging another pulsating comeback by battling from 12-4 down with a second-half rally.