From all five shows and some movies:

I actually saw most of this earlier today. Some are great. BTW, did you see where Disney is close to signing Harrison Ford for Star Wars episode VII?

Some time ago I watched a video with Trek bloopers and in one of the scenes Patrick Stewart and Marina Sirtis were both at the transporter room. They start shooting the scene and Stewart then says to the transporter chief: "Engage!", he immediately realizes what he said ("Engage!" instead of "Energize!"), looks at Sirtis and goes on: "Oh, no! What are we supposed to be saying in this case? I'm not sure... maybe, energize???" and both of them start laughing.

At this point I decided not to watch any more bloopers...

Yeah, I think he said, "What are we supposed to say in this room?" It was such a long blooper real that I bailed before the end. I enjoyed seeing the actors laughing with each other. Have always liked the fact that they get along so well.

I did not recall seeing that one from Enterprise before where the guy with a broom walks in between the green screen and the frame of the bridge view screen while they are filming. That was one sharp janitor to have the presence of mind to say "hey, I'm working here" once he realized he ruined the take.