how rude, next time, whatever her problem. She's gonna act like you did nothing? fine, shouldn't make a difference if you walk away in that case. Of course the mature thing to would be to help again, but you wouldn't have to be nice about it. See is the BO or manager can talk to her. If this happened at my barn that person would be packing cause nobody would welcome them anymore, no more "hey how are you?"'s as they walk into the barn
Equestrianism; 10% luck, 20% skill, 15% concentrated power of will, 5% pleasure, 50% pain and 100% reason to remember you're absolutely insane to be riding a beast that big.