Overheating watch burnt my arm

Quick question,

I just got my Watch™ and I've been using it for probably the last 6 or so hours, it's been great! It's so snappy, it just feels so good, and it's great I've finally found a way to check the time without having to take out my iPhone® 6 Plus™, it really is revolutionary, I'm surprised no-one's ever done it before.

Anyway, I used it so much it went flat LOL, so I put it back on the charger for a bit till it got back to 100%, don't wanna hurt the battery, and started playing with it again.

After a while I got bored and decided to go watch (lol) tv, so I strapped it on and walked off.

After about 10 or so minutes I started noticing the time got stuck, it took a few minutes before it changed again. Then it got hot, like, really hot. So hot I had to take it off to let it cool down. After a while it didn't get any cooler and what looked like a circle with a stick out the top showed up, then it turned off.

I don't know what happened, I kept trying to turn it back on but the same thing kept happening. After the fifth try it really started hurting my wrist.

I looked up overheating on here and all I could find was stories about MacBooks, but apparently that's just subjective and doesn't really count.

Is anyone else's watches doing this? For now I've just put a sock in between it and my arm so I don't get burned again.

Maybe it has something to do with the revolutionary S1 they're using, maybe all those chips so close together are what's making it so hot, I mean, it does everything the iPhone dose but smaller, maybe apple just innovated too hard with this one.

Maybe it's the microwave charger in the thing, what if it's putting power back out into my hand? Is there a way to turn this feature off?