Ren did his best to dodge the kunai which fell from above, but it wasn't good enough this time, to avoid from bumping into his teammates, an potentially causing one of them to be hit, he had to take a shot. The cold metal slicing part of his back as it narrowly missed his left shoulder blade, Getting himself ready only in time to watch as his teammate Maki got slapped around by their Sensei, but before He could do anything to help her, he found himself being blasted by chlorine, it stung at his fresh wound, his eyes forces closed as tears inevitably came coursing out, his lungs burned, his nose burned. Would Ren let this get him down though? Nope! "The pain lets me know I am alive!" He laughed as he turned his awkward flight into a summersault landed on his feet, miraculously avoiding the rest of the traps around him. 

Then a voice, a familiar voice spoke, The Mizukage! "Chigetsu! Is training done now?" The boy smiled and forced his now blood shot eyes open as much as he could, fresh blood trickling down his backside, he plopped himself on the ground, sitting cross legged, and cheerfully swaying from side to side. If not for the appearance of his body, you would never have known what he had just gone through.