This porn scene is famous for Evan Stone fucking Briana Banks so hard that the bed breaks.  Here are side by side stills of the bed breaking thrust at upwardmost position at left and deepest penetration at right. Some might wonder if the bed breaking was staged for the film but frame by frame analysis shows that his body slamming into her caused the bed to fall down. 

 These images show how extreme this sex is.  First of all let's examine her position.  She is lying on her back and her legs are lifted all the way up and back parallel with her body with her feet over her head and pushing against the headboard of the bed.  This position lifts her pelvis and allows for the deepest possible penetration of her vagina by his penis.  Her left hand is grabbing the headboard and her right hand is under her torso grabbing the small of her back, her torso is so contorted that it is actually tilted slightly upwards.  Perhaps she is stabalizing her body during his savage thrusts, grabbing the headboard as if to hang on to something and touching the small of her back to better position her spine in her contorted position or part of it could be a way to prevent her hands from fidgiting or spasing during the intense sensations she is feeling.

 His legs are spread eagle in a Y formation.  His left leg is bent at the knee and his right leg is more straight.  In the picture at left his entire torso is raised and his cock is almost all the way pulled out of her and looks like a pile driver pointing straight down with his balls dangling above and he is ready to let gravity do the trick.  His cock is big and it is a long way down!  

In the right hand picture at deepest penetration compared to the left it looks like she has been impaled to the bed by his cock!   He is a fairly big guy and he just body slammed her petite body.  Not only did he go down the length of his cock but he pushed her torso down creating a visible crater in the bed and her fingers under her back now barely visible.  His balls are squishing against her clit pushing penetration to the max.  It is a crushing blow to the bed so one could only imagine what is going on inside her body.  His cock is so deep inside of her that one could imagine her cervix or uterus being crushed from the pounding but female anatomy tells us that there is something called the posterior fornix, a bulbous pouch behind the cervix that allows the cock to arch around the cervix and womb and into her gut.  The vagina has incredible elastic potential, in this case it is like giving birth in reverse, perhaps this is why some of her screams during this intense sex almost sound like child birth, just with pleasure mixed in.