[ He shoots her an encouraging smile right back, and waits for her to step onto the bridge. Mark wants to make sure she's at least got her footing first before he joins her to cause more chaos, but her tensing has him tensing, ready to spring into action just in case.

So he puffs out a little exhale when it passes, too. And, still smiling should she look back, ] That's the fun of it, isn't it? Just having something sway underneath you...

[ It's pretty simple, he thought. He'd have thought there'd be worse up ahead, but maybe it's better to not speak that into existence? Anyway. ]

I'm stepping on, so don't worry if the bridge starts moving again or something. I'm right behind you... [ trying to be smooth... ] and if it moves too much, I've still got you.