My friends and I are filming a movie (poor man style) and there is this scene where a girl is taking a shower and I need to make the water turn into blood. I'm just going to be filming her from the shoulders up, basically concentrating on her facial expressions. She's supposed to have her eyes closed and enjoying the water. I'm having a hard time coming up with ideas to make the water turn red and be safe for her eyes, her skin, her hair, etc. and make it seem like it's coming from the shower head. Any suggestions?