I started playing Batman: Arkham Asylum yesterday and I found it amazing. I played it for a couple hours until I arrived in Arkham North, but then my left eye started hurting like crazy and I had to rest for a while.
Today I progressed a little more and came into Arkham Mansion. My mission was to reach Dr. Young’s research notes before Joker did. I had to get in her office to get the notes and even though I was able to pinpoint its location, I couldn’t get in. It took me a while to find where to go, but I did it. Here’s how to enter the office.

Warning! This post may contain spoilers.