Ok Smokingotter here to save the day. Since we don't have flycam this will have to do for now:
Circled is where I think the Shepard Breathe scene is:

Larger source file is here:
http://images1.wikia...ger_Conduit.pngPart of the overlay theory is that Harbinger's beam is the source of the destroy tube explosion.Destroy is the only option for Shepard to dodge Harbinger's beam. I'm pretty sure that judging by Harbinger's beam direction and the darkness of the breathe scene that Shepard is blown towards the right circle.
How do we know a reaper beam doesn't just vaporize but can blow a person towards a certain direction?! Precedent! From the beginning of ME3:

It's a bird, it's a plane, no it's Commander Shepard! Flying through the air without a care.