I will add, just walk away from your computer/phone while waiting. The game will progress without you and there's no negative effect to waiting for what feels like forever (It's just so painful to physically wait that long... I'm a speed reader, I don't have time to sit still!). When the scene has finished playing out, it'll leave the option to "return to the hallway" or "approach the lion".
If you wait longer, nothing bad happens, so go make a sandwich or something and just read the text when it's done.