Simple tests. I will scan your anatomy, and take samples. Nothing that would cause any permanent damage.

[He has what looks to be a strange cannon with him, curled inside his arm.]

If the worst should happen, I can change you back almost instantaneously with this.

[He pats the cannon.]

What I learn from you I suspect will be invaluable, however--it is important that we understand why these incidents happen.

[So that he can use it, for later.]