Okay, so maybe he's compensating for his lack of being able to see properly and the fact he's too dizzy to stand on his own by talking way too much, but this is how he's always coped with feeling vulnerable. Loud talking, loud jokes, to distract himself and everyone else around him.

"Misses a landing?"

It's genuinely curious. If Victor is going to give him a hand somewhere (relatively) safe, the least he can do is show some interest in what the older man is saying. Trust is not exactly Marco's strong suit, but after sharing a camp with a person for a few days straight in hostile circumstances, you cut a guy a bit of slack. So when Victor guides him over to a rock and helps him get settled down on it, he trusts him not to be sitting him in something dangerous.

Leaning forward, he rests his elbows on his knees and closes his eyes, which at least minimizes the colour in the weird swirly haze that is his vision, but it's still drawing dizzying swirls in black and grey on the insides of his eyelids. Ducking his head, he breathes evenly for a few moments, fighting with his vertigo and trying not to throw up.

"Mmm...I'd say two mouthfuls? The first one didn't seem to do anything, but the second. Wow. That was a trip. And yeah, it's morphing. Usually it gets rid of toxins and diseases and stuff, but...not this time."