The Doctor whistled to himself –a cheery tune he'd learnt from a larvae who lived on the fourteenth moon of the fifth world of the Larsshmaë solar system–, twirling his Sonic Screwdriver between his long fingers of his right hand as he strolled down a long stone corridor.
"You sure he's this way?" queried Martha hurriedly, jogging to keep up with the Doctor's long strides.
"You doubt my genius?" grinned the Doctor, pausing his whistling to glance back at Martha, making her blush.
Making a seemingly whimsical hard-left without even looking where he was going, the Doctor didn't notice Martha stumble to follow him. The Doctor pointed his Sonic Screwdriver at the thick wrought-iron door that was just down the hall he was going along; not slowing down in his fast pacing, the screwdriver letting out a vague purr as they got closer.
Just before Martha was worried the Doctor was about to smash his nose into the door, it flipped open and the Doctor walked straight in.
"There you are!" the Doctor crowed, coming to a neck-wrenching stop half a pace through the door, placing his hands on his hips in an authoritative manner.
Martha staggered as to not crash strait into the Doctor's back and poked her head over his shoulder after regaining her balance instead, grinning at what she saw.
Jack Harkness hung, upside-down, from the ceiling by shackles that were around his ankles, wearing nothing but a pair of hugging black shorts.
"'Bout time you two got here!" snapped the Captain, his arms hanging above –below, to the Doctor and Martha– his head, his fingertips about a metre from the floor.
"He looks like a christmas decoration," giggled Martha, stepping around the Doctor to come and stand in front of Jack, a bright grin on her face.
The Captain huffed.
"What did I tell you about flirting with the Fliizzians?" the Doctor sighed from the doorway, tapping his Sonic Screwdriver against his hip in an irritated manner.
Jack; hanging from the ceiling by his ankles, sighed pitifully. "I wasn't flirting!" he cried.
The Doctor pursed his lips. "Fliizzians only do that," he waved his Sonic Screwdriver in Jack's general direction, "to people who--"
"DOCTOR!" Jack yelped, eyes wide, drowning out the rest of the Time Lord's sentence.
There was a pause, Jack glancing at Martha, before looking back at the Doctor.
"... Just get me down," pleaded the Time Agent. "Please?"
"The magic word!" the Doctor chirped, prancing over and pointing his screwdriver at the shackles around Jack's ankles. "... Actually, the magic word is 'Mallafuuta', but no one's supposed to know that."
There was a loud 'click' from the shackles, and Jack fell to the floor.
... The hard, cement floor.
THUMP
" . . . Oh God, I am in pain."
"I'm sure the Fliizzians would be delighted to hear that."
"I told you, I wasn't--!"
"Yes, Jack?"
"... Nothing."
There was silence until they'd reached the TARDIS.
"Who are the Fliizzians?" Martha finally queried.
The Doctor immediately had a look of pure delight on his face as he turned to Martha, his eyes wide and glimmering with glee. "Well--"
Jack shoved the Doctor into the TARDIS before he could utter a syllable more.
((END. No idea why I wrote this, when, or any other words starting with W, but, I like it, for some reason. I also liked making up words. I do remember being irritated that Jack wasn't as flirty around Martha as he was in season one, and I think this is what I wrote because of that. Anyway, enjoy!))