[gallery link="none" columns="1" size="full" ids="67192"] Yes, the Christmas-Tree-on-the-Roof schtick gets a bit cluttered this time of year, but we’re still willing to drop some praise when we see a display like this. With runway rented for performance development, Hennessey Performance decided to try for top speed runs with a tree on top. First they tried Hennessey’s Porsche 911 Turbo S, netting 205 mph without the tree and dropping to 175 mph with the would-be fastest fir. Next came their...