The slow motion videos are what these guys are into and they can suffer a lot of pain for the result . Their passion is to film slo-mo videos so you can see really how much determined they are. The guy tries to keep his eyes open while waiting to be hit by a heavy wet ball.
They are obviously enjoying having nice time on the video, while i would not want to be in the skin of the guy who receives ball in the face but surprisingly he enjoys it. The camera man is having much fun while doing this, they are watching the result video at the and and laughing about the face muscles moving which can bee seen in slow motion 1200 frames per second. They try 3 times to make the video then with the slow motion camera see the results in different frame rates .