ICC Blitz 17 Move Mate

This Sicilian came as a shock to both me and my 1660-rated opponent on the Internet Chess Club (ICC). Notice black's unhinging at 13...Nd4 (disregard the "#" as chesspublisher incorrectly thinks it's a checking move) and mate four moves later with the shifting of a single pawn:




What made this all the more interesting was the time constraint: 3 minute blitz. Thinking under pressure devolves into pattern recognition, and may the player with the most internalized patterns win!