The turtles noticed that you saw them, which had you to faint, so they take you to the sewers to their hideout keeping you tied up, while you were unconscious

Donnie: Guys I think the human is waking up! He looks anxious

Mikey: Runs over and began to tap the humans face Hello? Anyone in there?

Raph: Don't touch it you idiot! You don't know where it's been!

Leo: Everyone just calm down, please.