Go to the Icy Side of Hailfire peaks and be Banjo-only; no Kazooie. Go to Biggafoot, who is blocking off a pair of Claw Clamber boots. The freezed scene dialog that ensues when you approach him initially consists of Biggafoot, Banjo, and Kazooie. Kazooie will say her line, despite the fact that she isn't there. It's possible that this works with any text-scene that involves both Banjo and Kazooie and where you can split up beforehand.
Submitted by: Kenjoki-Ikari