Nathan knew very well what the guy had planned for him, due to his previous experience. Probably a swing at his head again, or something equally bad. Or, y'know, just aiming the rifle at his general vicinity. Both options were thoroughly unacceptable.
The vortex died out, and Nathan wasn't the recipient of an absurdly fast hammer swing or a small hail of bullets. Good. Looking around his section of cliffside, he noticed a large, thigh-sized crystal of Kinetic Dust sticking out right below him. Passing his legs around Ergia, he let himself dangle off and stretched his arms to their limits, barely managing to get a solid grip on the giant piece of explodium. After a few seconds of struggle, he pried it loose - and nearly let it go, the weight being quite substantial.
He started to gently sway. Once, twice, three times, and then flexed with all his might, sending the large chunk of unstable stuff careening over the edge and directly towards the center of the plateau, where it would impact.
(Detonation: about 20-25% Aura damage, possibility of getting blown off the mountain)
(Aura: 46.5%)
(Ergia slugs: 215 | 300)