RIP Tawny Kitaen...
I think Lisa may have been the only female friend that Mason & Julia ever had, even though she turned out to be a spy. I really liked her.
You must have seen just bits and pieces of the episode, because there were several scenes of people hearing what was going on. The screaming didn't begin until right before Kelly pushed Dylan out, and Gina was outside the door hearing them (even though she thought Eden was in there). Nick heard the noise in the elevator on his way to that floor. Cruz, CC and Ted were in the hotel lobby and heard the commotion as well & the clerk was getting calls from other guests about the commotion. So no straining in that regard
Kelly pushed Dylan out of the window by shoving a cart into him. That, along with the fact that she feared he was going to kill Nick (who she believed was outside the room), makes it believable enough for me that she was able to push him out.
Also, the notes that Kelly had left for Nick but directed Dylan to the hotel insteadmade it seem like she had lured Dylan there as a trap. People may have known that Dylan was stalking Kelly, but Kelly was hardly stable herself at that point so I totally understand why self-defense was not proven. Remember, her story was that Dylan had a gun, but Gina had taken the weapon from the room, so the evidence didn't back up her story. It made Kelly seem like a confused killer, and she did make several self-incriminating statements after the incident.
It was a well-written and well-acted story.
Janitor? No, he was just a couple of classes ahead of Kelly. In fact, it was mentioned that Peter was teaching both Kelly and Joe before Channing was killed.