Eisenheim(Norton) is invited by Crown Prince Leopold(Sewell) to perform for a private audience. Leopold has the intention of proving Eisenheim to be a charlatan with no real talent and during the show asks him to show something that doe not involve "all the gadgetry". In turn, Eisenheim does an act with Leopold's sword, wherein every individual other than Leopold himself fails to pull out the sword.
I am at loss, as to, why was Prince Leopold offended at the end of the show? Was it simply because Eisenheim pulled out an act he couldn't unravel or was it because even Leopold wasn't able to pull out the sword in his first attempt? Because I remember him staggering a little when he does pull out the sword.
EDIT: The staggering too didn't go down well with me. Why does he stagger?