"Ah, no. The proper name is really lomcovak, which more or less translates as 'headache', developed by a Czech flier" - by now Rich knew better than to tell Arcturus it was somebody flying an airplane and not a broom - "in 1958. It involves tumbling your broom on all three axes while maintaining straight and level flight, or a dive, or a climb, for that matter, but straight and level is hardest. I'll show you a couple, then show you how to start putting the thing together. It is nothing but a bit of stunt flying, not something for racing or Quidditch, but it does demonstrate that you have complete control of your broom no matter how turned around you might get in the air. The practice you have to do to master the maneuver will also help you master what fliers from my time call reversed controls, which you have seen a little of, and what we call vectored thrust, which you haven't, yet. And, which will be quite amazing to the other fliers on the pitch when you do go back to your time and place."
"Of course you may. You'll find the procedure a helpful thing to do if you want to build your own brooms from scratch. After all, I do have a perfectly functional workshop here if that is something you would like to learn how to do."
"Yes, well..." He shrugged. "Ordinarily, I'd say it wasn't proper for a gentleman to celebrate a victory over another, especially a minor one like scoring, but it was good for team spirits, and involving the crowd with our enthusiasm for the match."
"So show me a few reversed control panic stops - don't worry about your speed until you master the basics and have a while to practice them, and then I'll show you the next thing you will be adding to your bag of tricks for the pitch."