My best bet is that you have watched the exciting car racing film Fast & Furious. In one of the scenes, we see Dominic Toretto organizing a drag race with some drivers and Brian O'Conner wanting to join the race. O'Conner decides to raise the stakes by wagering pink slips for his ride. Though a little overconfident, O'Conner never oversaw blowing the engine of his Mitsubishi Eclipse GS and handing the victory to Toretto. After that, you hear Dom tell Brian that he should have double clutched instead of "granny clutching."
Pause a little. You must have wondered right there what this double clutching miracle was all about. Well, you are not alone. This article is for you and the many thousands who would like to learn about all things double clutching.
Ok, so here is a crucial takeaway, you NEVER downshift when in a drag race. If you do, then you can only kiss the race goodbye. Yeah, it was in Fast and the Furious but real life advice; don't shift down while drag racing.