Hi everyone. We are new to Caravanning and this was our fourth trip however my partner is an HGV driver and also tows trailers etc several times per week in his business and has done for over 20 years so is an experienced driver. Hitched up caravan on Friday night, all okay, left the house, travelled round several roundabouts, dual carriageway then motorway and 13 miles from home on the motorway our caravan bounced and became detached, the most terrifying experience ever as we were in the middle lane doing 50mph, caravan veered into fast lane and ended up against central reservation. Thankfully no one was injured which was a miracle. We understand most detachments are human error. My partner had checked everything, green button was showing, his pick up is capable of towing the caravan etc. The jockey wheel has melted the cowling and a chunk out of the jockey wheel and it wasn’t attached to the caravan after this but wasn’t bent either. This had all been secured pre leaving home. Any ideas what could have caused this? Our caravan will probably be written off with the damage sustained. Thanks