To think that he not only got the focus right as well as the shutter speed to stop the drops midair. He was able to get the rule of thirds in, as well as the entire lizard. He must have also used a flash because of the dark background which just adds to the effect of the still motion of the droplets.
This is another example of perfect timing. They also had to have used a flash setup to the left to get that lighting effect which adds a creepy but cool aspect to the picture because you only see half of it there.
To get the entire action of this chameleon inside the frame is an amazing feat. Especially with the tongue shooting out like that. I don't know if I quiet believe the coloration at that moment specifically but I'm probably just not familiar enough with the hunting coloration of chameleons.
http://franslanting.photoshelter.com/image/I0000pzuZhCkxqF8
http://newsroom.unl.edu/announce/todayatunl/82/793
http://rationallyspeaking.blogspot.com/2012/02/love-and-reptiles.html