The accident featured in this episode " All Hallows Eve" was to sudden when it came to people outside of the vehicles, especially when abusing the ambulance's motives straight after the ambulance went through the traffic lights.
Ray's quote "In the immortal words of Nigel Tufnel, 'There's a fine line between clever and stupid, innit?'" is a three-way misquote from the film "This Is Spinal Tap (1984)": 1) The line was originally delivered by the character David St. Hubbins; 2) The line does not include "innit" (the British form of "Isn't it?") at the end; and 3) Ray transposed the words from the original "stupid and clever."