Pat Symonds, Executive Director of Engineering (Ayrton's first race engineer with Toleman in 1984):
"Dallas was what I would call an ‘old-fashioned’ North American street circuit, delineated with concrete blocks. It was a very tricky circuit, and bumpy enough to make even Monaco look smooth: the drivers literally had to fight their cars all the way round as they skipped and jumped from bump to bump. I remember during the race, Ayrton hit the wall, and then later retired because of the damage. When he eventually made it back to the pits, he didn’t seem to understand how he could have hit the wall. It seemed to come as a complete shock to him that he had hit the wall, and his immediate reaction was “I know I didn’t make a mistake – the wall must have moved.” Remember, we were talking about a twenty tonne concrete block here, but he was so insistent that he persuaded me to walk round the circuit and take a look. When I did so, the wall had indeed moved – somebody had clearly clipped the previous block and in doing so, displaced the next one by only about 4cm. Instead of the transition from block to block being smooth, a 4cm difference had caught the rear wheel, broken it and punctured the tyre. That was when it really came home to me, the precision to which he was driving, and made me think he was a bit special… And remember this was a guy in his first season of F1, straight out of F3…"