Having some issues with my rockshox pike 454 forks.

Just got back from the angry doctor - going down the downhill section at the 70k mark (after that enormous hill) I lost all travel in my fork.

All I get now is a loud clunk if I hit anything. There is no compression what so ever.

I am not into bike mechanicals at all - just love riding. Anybody got any ideas of what this could be ? Blown seAls ? Fork requires rebuild or fork is completely stuffed.

Will take it to LBS but just wanted a heads up before the guy at the store gives me alot of bad news.