Well, if he literally "just got it running," then I doubt the problem is anything as severe as that. The post is a little ambiguous, so it's hard to know what vehicle or how old it is. I'll assume that it's a new car.
I'll guess that the low-speed mixture needle is too rich. Pinch the fuel line leading to the carburetor once you get the engine started. you might notice the engine speed increasing slightly, which is normal. If it really revs like crazy, then you have a rich low-speed mixture and a poor idle speed setting. It should only take you a few minutes. The engine should only run for about 8 seconds once you've pinched the fuel line. If it takes longer to stall, then lean the low-speed mixture setting until the engine has a stable idle and wants to stall in the aforementioned timeframe.