Yeah, you know better than to step in the middle of a fight between a kung fu master and a guy who can keep up with him, even temporarily. Neither man has reacted to your presence yet, so you quickly take a couple of steps backwards and hunker down so that you're just glancing around one corner of the doorway. The new perspective reduces your field of view, but what you can make out is still enough to get a general idea of what's going on, without overly risking exposure.

And what's going on is that Lu-sensei is pretty much kicking this guy's Hawaiian-printed ass.

Oh, he hasn't scored a direct hit on the sorcerer/shaman/whosit just yet, but he's landed a couple of glancing blows when the other guy mistimed his teleports. Sensei's also forcing his enemy to use up a lot of magic in a short span of time: the gouts of fire and the nasty little summoned creatures aren't too expensive individually, but they're being fired off two or three times between each teleport; and the teleportation itself isn't cheap. Against lesser fighters, this sort of strategy would work out quite handily, but Lu-sensei is simply too fast and too skilled on the defensive. You know it, Sensei knows it, and from the expression of mounting desperation that you're catching glimpses of, the stranger appears to know it as well.

"Enough!" the spell-flinger cries, as he appears over by the open balcony door. Muttering words of a language you don't recognize, he summons motes of flame into his hand, forming a mass of orange-yellow energy no bigger than a marble. Though it's tiny, one look at the blob of flame makes your magical sense go PING with alarm, both at the amount of power being invested into it and how unstable that energy is.

No two ways about it, you're looking at a bomb in the making. Unable to penetrate Lu-sensei's guard with precision, the sorcerer appears to have opted for brute force - enough of it to fry everything in the front room, jet into the adjacent chambers and down the hall where you're standing, and shatter every piece of glass or other frangible object in the suite for good measure.