if i let you go , do you think you can fly?

here is when all starts... henry wanted to show mark his new hiedout in a tree house . henry climbs first . when mark tries to climb the branchers she stept on broke away but luckly henry catches her...
henry : .....if i let you go ... do you think you can fly?
what dose he mean? is he gonna let her go? ...seems like not ... he helped her to climb on then he was acting like nothing happened...

linert(c) me
mark and henry and story (c) the good son