Well, not really an ice-bucket challenge just yet. Rather, I was just practicing for how to get a good photo of a nice big water splash - and I think this shot met that goal. Jacqueline took the photo (after I set everything up), and Jana tossed the water onto me. Yikes it was cold!
I used my Jinbei HD600 flash to light the water from behind, and a little to the camera-right. I also placed my Nikon SB910 in front of me, to light my face, also displaced a little to camera-right. The SB910 was optically slaved to the Jinbei, using one of my great little "Flash Zebra" optical slaves. I shot at 300 mm f/10 to zoom in and get reasonable depth of field. The camera was set to manual mode, 1/100 sec exposure. The slow exposure was mostly to get some ambient light, since I figured the flash would mostly stop the water motion. And, by using rear-curtain flash sync, I got some nice trails behind flash-lit droplets.