With daylight fading, John edged out onto the log, balancing as he placed one foot in front of the other. He wavered, his arms out, flapping like a seagull. Looking down at the log, he steadied himself and took another tentative step. Then another. He wavered a little but managed to maintain his balance. Three more steps and he was closing in on the midway point. The tree bowed and sprung like a trampoline with each step. Two more steps and he knew he was going to make it across.