Eyes, ears, nose: the order which normal people greeted the world. For Kakashi it was different. Nose first, eyes next (always grey, sometimes crimson), ears last. Scent, sight, sound.

The blast that shuddered through the building a few steady heartbeats after he'd ghosted past the first internal guard made an unpleasant welcome for all three. Scent assaulted him, the combined weight of a thousand chemicals blasted together by force and fire, shutting his nose down in pure shock. Black smoke wreathed the air and stung his eyes. A shockwave of sound--more explosions, half a dozen violent blasts--made his hearing lurch and pop.

He smiled, sharp and dangerous. Somewhere close by, Ginta was having fun.

Then he ran.

A subtle approach was pointless; the element of surprise offered nothing in a building full of people very aware that something had gone wrong. But quick and devastating might give the missing pair a chance, if they didn't already have blades to their throats. Pulling on chakra, Kakashi blurred down a maze of corridors, leaving a trail of crumpled bodies behind. Workers, mostly.

A seventh detonation showered him with scorching soot and metal fragments as he skidded out onto the factory floor. Brickwork rumbled and shattered down, smashing into the wreckage of twisted machinery. Multi-coloured chemical floods swept across the concrete floor, mingling and spewing yet more acrid smoke into the choked air. Flame licked up the walls, barely held in check by the sprinklers bursting into life.

Kakashi watched one man fall from an upper walkway, screaming and slapping at the flesh peeling away from his limbs in steaming chunks, and resolved to stay the hell away from anything that even looked chemical.

Then he spotted a cluster of ninja--saw furious eyes register his presence--and snapped back into action. There was no way to conduct any kind of search in this melee. He slapped his hands together, broke his chakra into a double-dozen well-armed clones, and threw himself forwards. Aimed for the first ninja who looked like he might know where captives were kept.