You need to either create a slurry in a cold liquid, which also works with cornstarch, or you've got to do your gravy in a very wide pan and kind of scatter the flour over the top and then very quickly whisk it in.
Alton BrownMy mantra was to educate people - to actually give them the know-how they could use - and to do it in a very subversive kind of way. I would entertain them, and I was going to teach them whether they knew it or not.
Alton Brown