If Raistlin's impressed by the rope, wait until he gets a good look at a 26th century combat knife.

"Great." As far as Kerrigan's concerned, his arms aren't the important limbs right now, but it still counts as progress. "Can you get your legs without me stopping? I'd rather not go hand-to-hand with that thing." Positions reversed (assuming for the sake of argument that Raistlin would even be capable of standing up with her on his back) she'd be able to do it, but most people aren't as flexible or determined as she is.