Genjutsu (幻術, Literally meaning: "Illusionary Techniques") are techniques that are employed in the same fashion as ninjutsu, requiring chakra and hand seals. The primary difference between the ninjutsu and taijutsu is that the effects of genjutsu are illusory; instead of attacking the victim's body, like taijutsu or ninjutsu, genjutsu techniques manipulate the flow of chakra in the victim's brain, thus causing a disruption in their senses.
Skits (寸劇, Sungeki) are Rock Lee's form of genjutsu. Unlike the original genjutsu which uses illusions to attack the opponent inside their mind, Lee creates stories depending on the scenario. These skits are sometimes used for genjutsu, start off a new jutsu technique, or a past story. Whenever Lee uses these skits, he has his teammates involved and despite the embarrassment, they are willing to help. When Orochimaru uses these skits, he uses his assistant Kabuto.