My Boxer just collapsed this morning

[kiwi]

We woke up around 6:30 am and as usual I was walking my Boxer toward the back door for him to go outside to potty. All of sudden he just collapsed lying on the floor with his eyes open but not moving. It really freaked me out and of course I started to cry as I was trying to console him and yet urge him to get back up. It was as if he suffered a mild stroke or something. within about five minutes he was up, very responsive, and within a few more minutes went outside briefly. He returned inside and even ate. I found that during his episode he must have urinated as there was a wet spot on my carpet. I called the Vet at 7:30 am and have an appointment at 2:30 pm today. New member just looking for feedback..............