We all know firefighters are brave, in great shape, and work extremely hard to be there if we ever need them.
Here's a picture for proof (not that you needed it).
Those tiny dark dots up there?
Those are HUMANS.
Thornton Fire Department posted a photo of some hook and ladder cadets climbing up a ladder that's... wait for it...
105 FEET UP IN THE AIR.
Hope you're not afraid of heights.