I just finished this mission. And, well,.. I only died 5-10 times until I noticed the pattern:
You are only blown off as soon as the flag reach their highest “waving”, directly after that, you can go. There is no time span in which which you are blown off, only a single point in time.
After that, the platform jumping forces you to face a player’s worst nemesis: the camera. Seriously, at some point I had no idea where I was heading as the camera was too close to my character.
There is a lesson to be learned here:
jump&run and platforming passages outside of jump&run/platforming games are never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, never, ever fun.
In any single MMO that tried it (DDO comes to mind), they suck. GW2 is a good game, but it cannot into jump&run. Please don’t do this.