I kinda just thought of this one and exploded with ideas, so here it is! I hope I got the dialogue right...
"Where's Raymond and Mick?" Snart snapped at Rip.
"Uh, Ray is in my pocket, and Mick has elected to stay."
"Why?"
"Someone needs to be present to destroy the Oculus, Mick has elected himself." At that, Leonard rolled his eyes, got his cold gun ready, and set off to the Oculus Wellspring with Sara following close behind. He could hear the team shouting behind him, but he ignored them. Mick was there, sure enough, and being a sick, heroic, bastard as always.
"Mick!" He glared at the pyro.
"Get outta here!"
"Not without you, Mick."
"Pretty boy's not gonna this stick for the ship to blow. So I'm holding this stick. Now leave!" Mick had made up his mind. Snart had too.
"My old friend. Please forgive me." He regretfully drawled.
"For what?!" Snart bashed Mick on the head and he fell to the ground, unconscious. Len saw the lever rising, put his gun beside Mick, and he slammed the stick back down again.
"Get 'em outta here!" He said to Sara.
"No."
"Just do it." She looked at him meaningfully, stepped towards him, and kissed him. He leaned closer, wrapping his arms around her waist. Her lips were soft, warm, and possessive. But the kiss did not last long. As they broke apart he realized that she had intertwined their fingers and he gazed at her fearfully.
"If you're gonna die, you better die with me."
"Sara." He said the word like a promise, and he remembered something. A trapped moment, cold and confessional, together. "I mean, I like you, so at least I'm not dying alone." The glint in her eyes and her small smile told him that she remembered too, and he closed the distance between them again as the Oculus began to realize that its time was ending. At least he wasn't dying alone.