Bob Grant, playing bus conductor Jack, had actually worked in real life as a bus conductor in order to pay his way through RADA (the Royal Academy of Dramatic Art).
Blakey, Stan's Inspector:
'What's the matter with you, can't you drive? eh? Oh my god, look what you've done! Quick, get in that cab, pull away, quick! Hurry up!
Vera: I can't! Theres spiders in my cab!
Blakey, Stan's Inspector: Spiders? I don't care if you've got ants in your pants! You get in that cab and ...
When Blakey is thrown off the bus while Stan is performing the skid, he slides on the tarmac up to the insurance assessor. As he does so, the wheels on the trolley he is sliding on is visible under his coat as he stops.