Unfortunately that happens, although if what you said is correct.. the owner did tell you he was trained as a trail horse, nothing fancy. How old was this horse? It sounds as though you rode the trail horse home bareback, with just a halter and a leadrope. Am i correct? My gelding is trained completely and is leased out as a lesson pony for many kids. He's even trained with a 2 year old. To this day if i ride him with just a halter and a leadrope on a trail ride he will always take advantage of it. But throw tack on him and it's the best ride i've ever had. If it was the case that you rode your horse home in just a halter and a leadrope, unfamiliar territory and was it by the road? The woman shouldn't have hidden all the details from you, but it sounds as though for both your safety and the horses, you should have been ALOT more careful.
Count My Strides - Shane, Bought 2-18-06, Mustang.
"I whispered to my horse, "i'm afraid of falling" and he whispered back, "i have wings".