Don’t know about ice cream running out the back but do know of an incident where someone took a part load of eggs down the A75 and didn’t secure it properly if he’d set the fridge to plus 30 he could have held the record for the worlds biggest omelette 
Or the owner driver who tipped a -20 load in Holland reloaded with flowers forgot to change the temp and arrived in the UK with a fully frozen load of mixed flowers end of his spell as an owner driver.