What is a convincing way to get a fake blood splatter?

...Without a pesticide sprayer or something like that? Like, for a scene where a guy gets shot in the balls. The camera is supposed to be between his legs & on the ground to see the splatter, and there's only one shot at it.

My sister didn't get an opportunity to go buy a pesticide sprayer & tubes today for this scene, and she's freaking out.