ZOW! That's living on the edge! Flying through those gaps at 200mph is insane. I wonder how much reserve energy and lift they have. As they approach a gap like that, and they determine they are approaching 5' too low, how much can they pull up before stalling?
from the Wiki:
A typical skydiver's terminal velocity in belly to earth orientation ranges from 110 to 140 mph (180–225 km/h). A wingsuit can reduce these speeds dramatically. A vertical instantaneous velocity of -25 mph (-40 km/h) has been recorded.
Since 200mph is a bit high, the velocity is still tremendous. And if the wingsuit can achieve a negative dive, this means they can actually climb in one.
Now my reaction time is a different story...