ok this is a neat little glitch in bravo spawn of junk flea i just found. heres a tut on it.
first go here, run and jump on top of this box then.
then you should end up here
now you wanna run over to here from up were you are. dont jump down.
once your there u just need to jump around a bit and youll pop up to here.
And now you can move around up here and kill ppl .