At first glance it looked like the boy and girl in last picture were holding the canoes together with just their legs!
I'm assuming the canoes were lashed together somehow?
I had a buddy step into a canoe along a ledge with one foot instead of both and sitting down. By the time we reached him, he was about horizontal with the water and screaming in pain ;D
That's the image that came too mind viewing that picture at first glance!