Not overheard but: It was around 1955...
...and a new friend of mine called Marty from 30 years in the future had to go back to 1885 to bring my future self from 1985 back to the future, anyway, upon seeing the Red Indians on the painted wall he was going to drive towards at 88mph he said:
"But I will crash straight into those Indians"

He was so ignorant that he wasn't thinking 4-dimentionally and didn't realise the Indians would not be there in 1885!
(trentsteel Student radio scum: www.ramair.co.uk, Sun 9 Jan 2005, 22:38, Reply)