Lambert squints at Steven, baffled at the assertion. "You? But you come up to his knee."

Like, he's not exactly doubting his ability, he's just sort of skeptical of the physics of it. And Steven may not literally come up to his knee, but close enough! That being said, shifting his weight a bit makes him go pale as a sheet, so there isn't any choice -- he's shouldering off Strange's weight and pushing him at Steven and Yuya with a grimace.

"Fine, take him." Catch, kiddos.