I wouldn't say that Jane is my best mate but she is probably the one i've known the longest 
It was around 1973 when she was about 17 and I was 23, we were hitch-hiking to a camp-site in Dorset..the driver of a 'taupalin covered' lorry stopped to give us a lift.
Jane was a smoker at the time and during the course of a pleasant chatty journey where we were perched at the front of the cab with the driver she tossed her lighted tab end out the window (as you do/did).
Five minutes later, still cruising along, we heard a car horn peeping loudly.
The driver looked into his rear mirror and saw a cloud of smoke.
The tab end had only landed under the taupalin and had set fire to his load which was BALES OF WASTE PAPER!!
He screeched to a halt in what was a relatively quiet country road and we became panicky as we saw flames beginning to lick. the fire brigade was called and Jane apologised profusely.
Lesson learnt!
Fortunately the lorry driver was pretty cool about it and told us not to worry... in fact when a car stopped to see if we needed any assistance the driver insisted we accept the lift to the nearest town that this 'respectable business man' was offering.
Accept we did and the conversation soon veered away from the perils of throwing tab-ends out of moving vehicle windows to lipstick and false eyelashes
It turned out that our Good Samaritan was a closet transvestite and was taking the opportunity to glean some make-up tips from a couple of rather dizzy, giddy young women. 
jackfrost
Pro 
i used to hitch all the time back in the 70's....folk's were just as odd then as now...some of the people who gave me lifts were well weird!!!