What made my Woma going nuts?

[PatrickT]

My woma is a very curious and calm girl. She usually comes out her hideout, watchs around and looks whats going on. Two days ago she suddenly was hyper agressive. She came out her cave and went into a very defensive position. Her terrarium doors were closed but she did bite several times into the direction where she suspected movements. I did place a blanket over her tank to calm her down. After that she was as nice as before. Do you think something spooked her out? I drilled some holes in the basement and my suspection is, that the vibrations made her agressive. But i´m not so sure. Was crazy to see her "dark side" xD