"Be careful..." The spines might tear through.

He holds the munga out toward the jacket, keeping watch as best he can with his vision beginning to swim.

"I will administer an antidote. And then—" Handing it back to Chase wouldn't really accomplish anything now that he has confirmation that the munga does affect him, after all; if wrapping it in the jacket is successful, there's no difference who holds it. "And then we will hurry."