(I'll give it 6 posts before someone says it was my fault......)
On my way to Swinley the back way, pooling along, I heard a dog start barking and caught sight of it at the same time. The trail narrowed near a fence and these 2 dogs came out with the owner attached with 2 leads. I stopped dead in the wide bit and waited for them to pass. Stopped as in put my feet down and waited. Both dogs were barking at me and straining on the leads, but I wasn't worried as they didn't seem too nasty (Lanky white fluffy mongrel type dogs, Retriever size, Setter build) and they were on leads and there was plenty of room.
As she drew level with me, leaving my way clear, I moved off and instantly got a big old bite on the arse. I felt all the dogs teeth, top and bottom, but I imagine she pulled it off me and the teeth didn't break the skin.
I have to say I was quite miffed at this, and I did have a bit of a rage. She blamed the dog. "what did you do that for?"
I blamed her and told her it was her responsibility to train them and keep them under control, and if it had broken the skin I was going to call the cops.
To be fair, I think my main aim was to scare the living bejesus out of her. I did a fair amount of effing and jeffing. She knew she was in the wrong, a sweary northern accent in Surrey cuts the mustard I think!!
2 other MTBers came along whilst I was in full flow (Sorry about the language guys) and I explained that they should avoid the dogs as I'd just been bitten.....
Anyhow, just wanted to share..... 
I took a pic of the spot on my way back, just for reference. I was stopped pretty much exactly where my bike is lying, and when I moved off she was about where my Camelbak is standing, with the dog in front, so loads of room....
Untitled by PeterPoddy, on Flickr
Seemed it was a rogue dog as I couldn't find the owner to have ago at 
