At first Inigo doesn't even seem to realise that they're slowly, veeery slowly, moving up from the ground. Maybe it's because he's still so busy clinging to Senku, or maybe it's indeed just because of the tempo they're moving at, too slow to really be noticable.

Whatever it is, he doesn't make a sound during the first few moments.

And not until he suddenly realises that their view looks just a little bit different. It's almost as if they grew taller, or because..

Inigo gasps.

"W-Wait, we're really going up!"

He says it with such surprise in his voice that it kind of sounds like he didn't actually expect them to be able to do so. Or just because he didn't imagine how this would even happen with just that piece of canvas.