Disclaimer: I, PenguinQueen of the PenguinRealm (onewordedness!) do not own Star Trek, the Most Amazing Show That Could Ever Possibly Exist. Yup.

Tatiana had known Monty for a good part of her life, ten years of it, to be precise. She was well aware that it was not wise to expect anything but the unexpected around him. Over those ten years she had also, on more than one occasion, wondered if he needed mental help, more seriously than the many jokes she had made on the subject.
Also, being a good friend of Monty's, an established Trekkie, for ten years meant that she had seen more Star Trek episodes than she had ever wanted to, and thus could easily recognize the transporter room of the TOS Enterprise.
When she suddenly appeared in it, she did not shriek, her jaw didn't even drop. Instead, she turned to Monty and said, in a calm that Spock would have been impressed by, "Monty, this is not California."

Monty's real name was not, in fact, Monty. It was Michael Jones, but he glared at anyone who called him that. It didn't matter if it was a parent, doctor, teacher or principal, he wouldn't put up with it. No. He refused to be called Michael. Michael was a boring, dull, everyday name. As a replacement, he had chosen Montgomery (A/N- take a wild, wild guess at his favorite character), but no one ever called him that. And so, he became Monty.
Standing in the transporter room of the Enterprise, Monty did a combination of things that normally would have been used by his favorite characters. Raised eyebrows- Spock. A look of absolute confusion under those eyebrows- Kirk. Slight swearing under his breath- the good doctor, McCoy. But collapsing to a kneeling position on the floor was completely his own.
When Tat told him where he was not, he merely looked up at her, his mouth hanging open in complete and utter confusion, like she was speaking some strange language that he could not understand. California? What?

Enisgn Luck had the most sense of anyone in that room. He pushed a button on the comm unit on the wall and reported, "transporter room to Captain Kirk."
"Yes, what is it?" A voice that sounded slightly irritated at being interupted came bounding out of the comm. Slowly, slowly, Monty turned his gaze to Ensign Luck and the comm unit. His mouth closed, but other than that, he remained completely still.
"Um, well sir, we've just beamed aboard two people that do not belong on this ship."
"Well, why'd you do that?"
"Um, we didn't, sir. They beamed aboard, but not from my controls."
"Do they look dangerous?"
Luck looked over to the zoned-out Monty and observant Tat. "No, sir, they're just teens."
"Bring them to the um... hmm. Ok, bring them to the bridge." Kirk finished. Why not? He didn't feel like leaving his command chair at the moment, it was padded an besides, he had the whole ship at his fingertips. Who cared if two lost teenagers got a tour up there?
Monty grinned an ear-splitting grin when he heard this. The bridge! They were going to the bridge! Oh joy of joys, the bridge!
Tat rolled her eyes and dragged a beaming Monty of the transporter pad and after Ensign Jack Stutters, en route to 'The Bridge'.