I would give it a really good scrub with disinfectant because fishy water and sometimes stink when it dries. I had the same thing, one of my filters started leaking all over the carpet and the smell wasn't too good.
you have learnt a very valuable lesson that everyone should learn from, leaving a hose half in and half out in your tank can easily start a siphon. I've had it happened to me occasionally when I have just finished putting water back into the tank with a hose, one end is in the tank, the other end is on the tap, when you take it off the tap, a siphon can start