I am calling my vet in the morning since its Sunday and they are not open today but the last few times my dog has drank water he like falls to the floor and can't move for a few seconds... almost like passing out but he is conscious... but his body just falls over to his side and he can't hold his head up or any part of his body... I pick him up and hold him for a min and he is fine after that and it only happens after he drinks water... anyone have any ideas or every had this happen to them... I have a almost2 yr old min pin...

What kind of water do you give him? Maybe you should try some spring water or some kind of water from the grocery store until you can get him checked.
There could be a chemical in the tap water he is developing a serious reaction to.

I do give him tap water so I will go to the store now and try some spring water thanks a lot hope this works

This is the only other thing I can think of
He may be having seizures so try this,
Even if he seems better take him to the vet asap

Epilepsy Remedies for Dogs (http://www.earthclinic.com/Pets/epilepsy.html)

Even if it isn't epilepsy these things should be safe,

First, it's good that you are taking the dog to the vet, since I really have no clue what is causing this. Just given the association of drinking with the event, I might be looking at electrolyte balances in the blood, but I wouldn't expect that dramatic of an event in such a short time.

Dear Hol
I'm so sorry to hear about your dog's condition. My 10 year old Jack Russell has just started exhibiting exactly the same behavious when drinking. Did you ever find out what the problem was or manage to find a way to treat it?
Kind regards
Paul

It could be something as simple as the dog holding its breath while it's drinking. Could also be something a bit more sinister, I've never heard of it personally so hopefully the vet knows what's going on :)

Since I have been giving his spring water this hasn't happened anymore he got bloowork done and nothing was wrong so ill just keep giving him spring water

Good to hear, hope the bloodwork comes back clean :)