Toaru Kagaku no Railgun Episode 04

Synopsis
It starts off with the Mikoto, Kuroko, Uiharu, and Saten in a dark place, holding cellphones. Saten is telling a scary story- about a woman that undresses. Mikoto instantly proclaims that such a thing isn't scary.

The scary story mood is broken up, and Uihara pulls up a website listing several urban legends: Mikoto is visibly startled by that proclamation, as she begins to wonder about this ability. A flashback begins, where Mioto is being hit upon by several deliquents, thinking that no one is going to interfer because they would have to be an idiot. Unexpectedly, a black-haired youth appears, claiming that she's his little sister. She refuses to play along with such a stupid idea, causing the other to break down and begin chastizing the deliquents for gathering around a single girl, and proceeded to call her a "kid" with a "rude personality" and "no respect for her elders", that simply "looks like an ojou-sama, but is actually a teenage rebel."
 * When the wind turbine propellers begin turning the other way, something strange happens in the city.
 * At 4:44 p.m. one shouldn't cross betwee the school district boundries. Otherwise one might wander into the "Imaginary Number School District"
 * At item that increases your level just by using it: The Level Upper!
 * A guy that has an ability that prevents other abilities being used on him.

Mikoto proceeds to fry all of the deliquents. After said frying, she thinks she's gotten them all, but the youth that had been insulting her in the frist place is the only one unharmed. She begins to ask him what he just did, but he runs away.

The flashback ends, and she exits the store in time to see the youth she was thinking about talking to a lady in the middle of the street. The two begin to bicker right then and there when the lady begins to undress in the middle of the street. The boy flees, and Mikoto is stuck finding the ladies lost parking lot.

It turns out the lady is Kiyama Harumi, a researcher on AIM movements. The two begin talking, with Mikoto questioning about whether or not the ability to negate other abilities is actually possible.

Meanwhile, Kuroko, Uihara, and Saten are in a small cafe, talking about the phone call Mikoto had given them earlier. Saten begins making up talltales about how those who cross the Undressing Ladies path will be cursed themselves to begin undressing. Kuroko goes insane and begins to demand that Uiharu find a cure.

It goes back to Mikoto and Harumi, as the researcher gets ice-cream on her skirt. She immediately begins taking off the skirt, before Mikoto stops her, and offers to wash it for her. While in the bathroom, a conversation begins about how Mikoto likes the boy from earlier, and how she should thank him. Mikoto denies liking him, to which Harumi begins trying to find the right word for her before Mikoto accidentially fries the bathroom. She then pushes the researcher out.

It skips to where night is beginning to fall, and they had at last found the parking lot. Mikoto tiredly walks away, muttering about how it's all *his* fault. Touma's scream of sorrow is heard, as sorrowful BGM music plays in the background over his broken eggs. Mikoto demands a fight.

The scene changes to a riverbank, where Touma claims that they won't damage the surroundings, and that they can now fight. Mikoto throws a large bolt of lightning at him, which he blocks. She then summons the iron sand to create a sword. Touma protests that's foul play, which she ignores. She begins to attack, and he dodges, before she converts the sword into a whip, lashing out towards him. He blocks it, reverting it back into sand. Mikoto manipulates the electricity to create a sand storm above him, and shot it towards him. He uses his right hand to block, and she grabs his hand intending to send electricty through his body.

It doesn't work.

Touma raises a hand to punch her, at which she flinches away. He stops, and then suddenly (with poor acting skills) collapses to the ground proclaiming he's lost. Mikoto's response: "D-D-Don't screw with me!" along with large lightning bolts.

The rest of the night is spent chasing.

Adapted From
Adapted from? which chapter of manga and/or novel

Referbacks
references to previous episodes, possibly from Index(based on timeline)

Cultural References
"easter eggs"

Quotes

 * "Hey! That wasn't scary at all!" -- Mikoto Misaka to Ruiko Saten, after hearing the latter's story about the "Stripping Lady"