He is being challenged by his friends to jump, peer pressure.
Dialog:
00:08 - is it deep?
00:10 - yes it is.
00:40 - Jump now, i'll also jump so i can save you
00:45 - come on, hurry up. Jump now! (kid jumped onto his friend in the water)
You can see the kid struggling in the water and is holding on onto his friends.
00:58 - hey, help him!
1:04 - he is gone!
1:10 - help him, help him!
1:11 - don't worry he will float later(does not know that their friend drowns already)
1:20 - where's your friend? - he is under the water!
1: 25 - there he is! jump, save him!
1:30 - I don't want to. I might drown as well ...
