While this is a fascinating phenomenon, there seems to be a bit of anthropomorphizing here in the way these things are described. At least this article didn't refer to them "screaming".
That's because deep in the forest, where the Arabidopsis thaliana grows, nobody can hear you scream...
Anthropomorhizing helps to liven up a dull thread - I hope. "They" did it - so I'll help out, as far as I'm able. It's a dark and lonely job, but somebody's got to do it.
There is another documentary that might of interest on this subject. It is called "Plants Behaving Badly - The Intriguing Behavior of Extraordinary Plants." It has a part that deals with carnivorious plants.
Yes, there is. Laid-back as a Love-In. Gather your texts, go to your hydroponic setup and "commune with your buds." Mark off another "day-till-pickin" on the calendar. Sweet!