GETTING A NERVOUS HORSE TO RELAX ON A RIDE

My Roan Gelding is always tense his entire neck all the way to his hind quarters. When he is like this he bucks and bolts off with me. We have owned him for 6 weeks we got him with no history at all so I don't know if this will be something that can be changed. He is very headshy when he first arrived I couldn't even get a halter on him. Progress we can now catch him and halter him. But I can't get a bridle on him.

Thank you for filming this! This exact situation happens to me often w/ my TB and nobody else films the raw situation