I pull my shorts down the front with one hand, haul my dick and balls out over the waistband then piss without holding it. If needed, I aim the downward stream by sticking my hips out to position it over the bowl, ensuring I stay away from the splash-zone. If the urinal is too high up, or if I'm intentionally trying to piss on something, like a smoldering campfire, I'll hold it near the base and aim it like a big soft hose, away from my body. This is the best way to show off and intimidate someone at the urinal, but it's been a long time since I've felt the need to do that.