Kuga can't break grip

Santoro laid his hand on Kuga’s arm, but Kuga whipped toward him and slapped it away. Or tried to. Santoro held on, though, and despite the difference in their size and forty pounds of weight, Kuga could not knock that grip away. The rock steadiness of it, though, also steadied him. He let himself be pulled down to his chair.
-Rage pg. 340