Desperation wasn't a factor ... The Winter Soldier had done operations with nigh impossible odds before. No, he was beyond desperation. He was disposable. If he needed back up, it wasn't coming, no one was waiting for extraction once the job was done. He either made it out or he didn't. His job was to kill the target, even if he died trying. He was more reckless than she was, more dangerous, because he wasn't inhibited by basic survival instincts, he wasn't fighting with the thought of self-preservation in mind, his goal was to neutralise target by whatever means necessary. His body was expendable.

The fall was hard and fast and the impact wasn't pretty. Stephanie had to sustain most of the blow with her own body, the Winter Soldier, though landing heavily, allowed his synthetic arm to absorb most of the blow, twisting himself like a cat in freefall miliseconds before impact. 
It was a jarring blow, but he recovered quicker than Cap did, only because his metal arm absorbed the blow and if it were made of flesh and bone it would have shattered. The arm made a whirring noise, a number of clicks and he pushed himself up off the ground as dust sprinkled down around them. Already SHIELD operatives her trying to close in on him. Natasha aimed at him, a SHIELD agent edged forward to cuff him. The handcuffs wouldn't be strong enough, but the Winter Soldier stood eerily still, eyes scanning the agent and Natasha, Steph was groaning and getting back on her feet. 

Of course, they wanted to take him alive if they could. The Winter Soldier was a ghost story from the depths of HYDRA ... he held so many HYDRA secrets, they'd kill him if they had to, but now it looked as if they could capture him, and if they could do that, they could interrogate him and dismantle HYDRA. 

[b]"Stand down"[/b] Natasha warned, but the Soldier moved too fast. He waited till the SHIELD agent was close, almost cuffing him, then he moved fast, [i]too[/i] fast. The metal arm glinted in the light and the agent made a choking noise as silver digits wrapped around his neck. He flung the agent like a rag doll, crashing into Natasha who, in trying to protect him, dropped her gun. The agent was coughing and gagging, throat heavily bruised but ... still alive fortunately. Natasha scrambled to shake the dead weight off her, but the Winter Soldier was already descending upon Cap and her gun had skittered across the floor when she fell back. 

The Winter Soldier watched Steph, the scuffs and dirt indicated what sort of position she'd landed in, and he went for it, readying a metal arm to deliver a precise punch to her already beat up side, where he knew it would hurt her most. She was fast, but he was fast too. It appeared as if he wasn't at all affected by his own injuries, the joints where bone met metal screamed in agony, the fall had taken its toll, even though he powered through it, he was conditioned to ignore pain, but even his body had physical limits. 

Nat wanted to check on the shield agent the WS had taken out, but there wasn't time, he was breathing, gasping crazily, he'd be fine on his own, Steph needed back up. She ran up, going for her trademark move, lacing her legs around the Winter Soldier's throat to try choke him out or at least pull him off balance. She didn't know how he did it ... he staggered back two steps, violently jerking his weight to one side to throw her off, although she didn't slip off, she was surprised he managed to stay standing and fight so viciously. His organic arm reached up and snagged her by the shoulder, metal arm coiled up to defend from some of the blows from Cap. Nat tried to give Cap an opening to strike, though it was a narrow opening as the Winter Soldier yanked her down and chucked her aside as if he was just shrugging off a shoulder bag.

She tried to sting him with a Widows Bite as she tucked and rolled out of the rough landing. She ran up, hoping the shock would be enough to wear him down to let Steph get a proper advantage in the fight, but instead he struck her with a mean left hook that sent her clean across the room. Nat crumpled into a ball, nursing her aching ribs and stomach, dark spots flashing in her eyes from the pain. She couldn't see straight but she hoped the distraction gave Cap enough time to win this fight. Nat blinked furiously to refocus her vision, scrabbling for an EMP disc, hoping she struck her target. The Soldier was reaching for a holstered glock. The disc fried the circuitry in the metal arm and it hung dead, limp, glittering with waves of blue electro pulses shivering along the parts. A noise escaped under the muzzle covering the Soldier's face, a strangled grunt of shock ... [i]pain?[/i], but he yanked the EMP-disc off, the arm made a clunking noise but seemed to reanimate.