You wake up in Eriks house and have his mask in your hand. You have no clue how or why you go there. What do you do?

phantom-of-the-keurig:

Easy, I immediately place the mask on my own face and complete my dream of becoming the phantom.

I then forcibly kick Erik from his underground home and reclaim it as mine.

I am the Opera Ghost now. I live a happy life locked away in complete solitude and occasionally haunt the good folks of the opera house.