As Sylvia made her way through, following Jackson's lead, she found herself not liking the cave she was in. The fact that rotting timber was the only thing supporting the ceiling made Sylvia nervous. This place seems like it could collapse on her any moment. 

She tried to distract herself from the cave by focusing on Jackson, who was sniffing at the door. As tempted as she was to just open the door and bust on through, she realized that just barging in may not be the wisest idea.

She wanted to try and peek through the under the door, but she found that she could only see a table, and that was it. 

So, it was time to try and head in. So, she attempts to push the door open and enter the room, and let Jackson into the room as well.