startrek elite force 2 -help needed

[stryder]

hi
in startrek elite force 2 on level- DISCOVERY-ALIEN PLANET- after sealing the gas vents, can anyone tell me how to get across the frickin flickring purple bridge preferable before i go insane. i looked at a couple of walkthroughs and they just say have to you jump ,which is no help whatsoever

 

[stryder]

thanks for that mate. but how do i get into third person mode?