JO: It's all right. I've dealt with it.

DOCTOR: Dealt with it? You've ruined it!

JO: But your bench was on fire.

DOCTOR: Three months delicate work and now look at it, you ham-fisted bun vendor.

JO: But this whole place might have gone up in flames.

DOCTOR: My dear young lady, steady state micro-welding always creates more smoke than fire.