Your character is named Faith, and she effortlessly wall jumps and rolls along rooftops with fluid confidence. Or at least, that appears to be the case in the first-person point of view. If you zoom out a little, you'll see Faith's movements look more like a drunk chasing after the children who stole her corrective shoes as she violently shits her pants.
She moves like the plot of Speed in the form of a human woman.
Anyone would feel a bit of panic while running along the edge of a building. So maybe it's her proximity to certain death that's causing her to move like a malfunctioning robot. But Faith looks even crazier during her casual strolls, like she's being controlled by a puppeteer trying to get fired.
"I AM walking a straight line! Maybe YOU'RE the wub that's intoxifated, occifer!"
The animators gave Faith's body all kinds of medically impossible twitches in order to make the game work. For instance, when she struggles across a tightrope-like pipe, the player sees this: