I will add i never put mine across main roads, ive seen loads of window cleaners do that and ive always thought it very daft.
Mine was laid perfectly flat as well.
laid perfectly flat?
You said in your original post it was wrapped around a car, please explain?
Allow me to explain to you to satisfy your curiosity.
I was parked in a very small parking area with 3 other vehicles parked.
My hose was laid perfectly flat across the car park to where I was working.
I noticed a car pulling out of a space but I don't pay much attention until I heard a crunch, the hose going tight and my reel exiting my vans back doors. As the reel hit the ground the hose snapped.
I went to the end of the car park and looked up the road, I could not see the car it had gone but a bloke told me it was wrapped around the car!
I don't know exactly how it happened but it did