Qualifying performances from "another dimension"; thrashing his rivals repeatedly in torrential wet conditions; doing whatever it took to win the world championship at all costs. Ayrton Senna's too-brief time in Formula 1 was a colourful tapestry of brilliant driving and high-stakes controversy. On the 25th anniversary of his tragic crash at Imola, Autosport brings you the most unforgettable moments of the late Brazilian's F1 career.