I think you and I must have had a similar upbringing Mick, my best mate at the time, Ocker Balmer and I did exactly (ex-fcuking-zactly!) the same thing, the shops in Bairnsdale (where I grew up) had a big car park in Riverine Street and therefore, there was a lot of slow moving traffic, so we had much fun with the "Turd in a shoebox" trick.
Now for an original story. When I was posted to Sydney in 1980/81, I drank on an all too regular basis at the West Ryde Hotel. Great pub, lots of bikers and babes, and always something interesting to watch, like a shooting, or a stabbing, especially when one or two of the local 1% clubs were involved. I saw the Bandido's and Comanchero's "getting it on" (not in a sexual way) only a few months before the Father's Day Massacre. Good times.
Anyway, I was drinking with my mate Tom, and a guy who was vaguely familiar came up to us and introduced himself as a driver in the Army that we both knew, who'd been thrown out for drugs a couple of years prior. I'd known him to say G'Day to, but I didn't hang out with him, and I didn't know he'd been dishonorably discharged. (For the purpose of the exercise I'll just call him Bill, I won't mention his real name just in case he's still alive, which I seriously doubt.....)
He was drinking with his mate, another ex-army guy who'd gotten out around the same time that Bill got the boot. Unlike a lot of other industries at the time, soldiers had superannuation even back then, so they'd both been given a few grand each, so they decided to drive around Oz in Bill's HX "Sandman" panel van. They'd drive all day, then sleep in the van at night, usually after around a million beers and a few joints. As it was Bill's car, the deal was that if they were lucky enough to pick up some women, Bill would sleep in the panel van, and his mate would have to seek alternative accommodation for the night.
They got up to the Gold Coast, and dropped into the North Kirra Surf Life Saving Club for some drinks. After much drinking and smoking, Bill managed to pick up a nice local girl for some nocturnal exercise. Bill's mate slept on the beach. Next morning, Bill's mate wandered back to Bill's van, and saw that the tailgate was wide open, and people were standing around laughing, or looking disgusted, or both.
What had happened, is that whilst Bill was "making love" to the local lady, he accidentally brought up his lunch, and vomited all over her. He apologised and she seemed to be accepting of his remorse, so they cleaned her and the van as best as they could, and went off to sleep. Then she waited until Bill was unconcious, straddled him, and dropped a huge "Blind Mullet" right in the middle of his naked chest. She then opened the tailgate so that everyone could admire Bill in his birthday suit, with that thing parked on his chest.........