The Case of the 27 Knife Stabs

In an alley, a weak woman stabbed a strong man 27 times with a knife and was arrested on the spot. However, there were no signs of struggling at the scene, it was strangely calm. The mu*derer faced the policeman’s questioning with pure puzzlement, she seemed like she just woke up from a dream. She said she didn’t know anything, she only remembered painting at home…

What the hell happened?