As far as getting into the bottom end .... the fuel goes to the bottom end before it goes into the top. If you caught it that fast, you may not have a problem. If you're really concerende, you could take the topend off and flush the bottom out really good. Doesn't sound like you would have pulled in very much though.
After you do what ever you choose, (take it apart or just clean the carbs and run it), do a compression check. You're carbs should be fine, just clean the up and use compressed air.