"What the hell?" The Messenger was on all fours and cursed as he came face to face with huge rotating fan blades blocking his way in the ventilation duct, unfortunately the speed was not stable. Rotating slowly at some time and then speeding up a bit.
He studied the pattern and his thermal imaging spotted motion sensors and triggers around the blades, any disturbances would immediately trigger alarms.
"This might hurt a little." He cursed under his breath and bid his time before throwing himself forward on his belly and slid through the small gap between two metal blades. He narrowly missed the blades by inches as it picked up speed.