Quins into final
Harlequins wrecked Munster's dreams of a domestic and European double with a polished 20-12 win in the Thomond Park sunshine.
Conor O'Shea's men became just the second team to beat Munster in a European match at the Limerick venue, following up on Leicester's Heineken Cup pool win here in January 2007.
First-half tries from George Robson and Danny Care set the tone for Quins, who will face Stade Francais in the Amlin Challenge Cup final in Cardiff on May 20.
Winners of this competition on two previous occasions, the Londoners were outstanding in the opening half-hour, controlling play and winning the collisions.
Nick Evans missed two penalty efforts and Munster closed the gap to 14-7 by half-time, putting Felix Jones over for a relieving try in the last minute.