When playing games of Halo, a lot of times it was just as much fun as killing each other to focus on dropping grenades under your warthog and seeing how far you could jump the thing. Now that fun pastime has it's own game in the form of Warthog Jumping! Bounce on the walls and try to avoid the alien spiders. As you start out, the slider on the bottom left adjusts the placement of your warthog. There's two sliders in the middle section of the bottom of the screen - top one will change the placement of the grenade pile, and the lower one will select how many grenades you have. Dial in your settings how you like them and click the red start button, or the yellow arrow at the bottom right corner to change the level you're playing in.