I travel all round country with my new job and see a lot of lorrys parked up asleep with the back trailer doors open even when there full of gear? I would understand if it was red hot and they was wanting to get some cool air in there incase anything gets damaged/ruined through heat but ive seen this in freezing cold weather and rain. or even if they opened the back trailer doors to show there's nothing in the trailer to nick, but in most cases there is... tons of it.. Proper random question, but just curious as to why lorry's do this? I could easily park up and get me sen a few freebies why you read your books/sleep.