Watched her take off and land a few times this week at the airport. She is a micro gravity test plane. “Vomit Comet”
Gotta be better than a roller coaster. 
I know FA (or the feeds it gets) glitches the altitudes a lot, so considering this plane rapidly changes altitude, is there any way to know which radical changes are real and which are typical glitches? I’m assuming at least the jump up to FL280 from 1,700 in 1 minute is a glitch. 
And why did it stay at FL200 so long?
I’m guessing they had to clean up all of the cookies that got tossed, and then had to serve breakfast again! 