Runaway engine..what do I do besides clean my shorts?

[DHayden]

OK yes it was bone headed and totally my fault. My fuel gauge was a little off and I ran her out of gas. I bought some starter fluid to escape breaking the fuel lines and bleeding. This happened once before and this old timer offered me this little trick, when he did it he sprayed quite a bit into the inlet as I was cranking the engine.
Well this time I was on my own so I sprayed "a bit" more into the inlet since I had to come around and start the truck on my own. Well...it started, and raced to about 4000rpm. I had turned the ignition off and was reaching for the fire extinguisher but had a moment of self preservation kick in. I figured by the time I made it around the front to spray the inlet with the extinguisher, the engine would come apart and grenade me.
Well anyway, the truck is running now, just wondering how much damage I did and to what with the rpm meeting or exceeding 4000rpm. It didnt come apart so thats a good sign, I am guessing it wasnt so good for the lifters, it doesnt sound different and seems to run as good as before...any advice? Much appreciated.