[His unmanly scream makes her laugh, of course, but she shifts slightly to hold him a bit more securely. There's definitely a sense that she's enjoying this a lot...]

Well, because you're too tall, of course. I couldn't carry you that way without it being really awkward! I'd be off balance.

[She laughs a little more, looking ahead]

So are you ready? It'll probably take you a few seconds to get used to it.