You mean a response like Superboy gasping, shaking, and falling to his knees? He clutches at his chest, at his heart palpitating out of control at the presence of the green stuff, and sweat starts streaming down his face.

"Tim--what...why...?"

He gags, not throwing up--oh wait, the next time, he does throw up, and spits, then turns over to fall on his side, twitching and gasping, looking up at his friend, his face twisted in pain and shock.

"......"