AirPigz points us toward this excellent cockpit video footage of a US Navy Blue Angel F-18 refueling in the clouds:

This video from 2009 would be cool enough if it was just an F-18 sucking up some gas from a KC-135, but it's more than that. It's a Blue Angels, F-18 sucking up some gas! Oh but wait, it gets even better... they're actually flying thru the tops of the clouds while the Blue Angels F-18 is sucking up some gas!

And to top it all off (no pun intended), the pilot has added some excellent voice-over to explain a little about the refueling process.