Falkirk booked their place in the semi-finals of the CIS Insurance Cup after a dramatic 5-4 penalty shoot-out victory against Celtic at Parkhead.
Substitute Maciej Zurawski's header gave Celtic a 99th-minute lead which was cancelled out by Anthony Stokes' volley.
Evander Sno blasted wide in sudden death after Jack Ross had scored Falkirk's seventh penalty.
Kilmarnock beat Motherwell 3-2 in their quarter-final clash with a late winner from Australian striker Danny Invincibile.