Tatsumaki is absolutely skeptical about hypnosis, thinking it beneath her to fall into a deep slumber just by staring at a glowing pendulum.
Either way, she gets deeply hypnotized by the mysterious forces of the Ethereal Chamber and then gets laid into the Bed of Absolute Sleep, where she will doze off in her quick hypnotic nap.
But now that she is awake again, she wants revenge, therefore she turns to hypnotize the viewer (You), who let their guard down, thinking the girls cannot fight back through Hypnosis themselves...