Many years ago when I had a "Real Job" the boss builder from next door came in and asked could he park his car in our car park, me being the nice guy said yeah.
Anyways he came back later and asked did I back Horses, he gave me a tip and said it was a dead cert as they had it organised, put a few quid on and it obliged .
Few days later he came in early in the morning and gave us another tip, later on in the day came back in and told us not to back it as "They" had changed there mind and it would not win.
Funny things go on in that racing world