It’s the heartbeat of Hal, coming back to life….
Made my morning today! I laughed so hard on this one! 
Tell the crew not to look out the window.
There was a Twilight Zone episode with Shatner that will explain all.
**Alien: Romulus**
Coming to a Starliner near you.
Opens on Labor Day.
Tickets available on Fandango and Ticketmaster
or wherever Boeing parts are sold
Wild.
‘It never rains but it pours.’
I wonder if Boeing still has a surplus store. 
(Looong ago there was one in Kent.)
I really think it should land in Kansas, so that Dorothy and Toto are closer to Auntie Em’s house.
I imagine the guys on the ground at Mission Control have now experienced what automobile mechanics deal with every day.
"Hi, yeah, my car is making this noise, umm, kinda like a “thumpy, eeeoooowww, squeekey, boooshy, ran-rang sound, you know what I mean, right? Can I pick it up this afternoon?”*
Funny noise??? Despite NASA and Boeing’s best efforts, the constant issues have made it hard to have much faith in a smooth return.
They should just load about 400lbs of Space Station trash in Starliner and send it home. That should about equal the intended occupants and whatever stuff they haul along with them. No need to reprogram anything that way. Close the hatch and kick it loose.
Possibly the muffled, but banging sound of a stowaway? You know, another Boeing whistle blower who thought the Starliner was a safe place to hide from the “suiciders squad”!
I think mission control nailed it. Sounds just like a WWII sonar ping from a destroyer attempting to track an enemy submarine. Pretty appropriate for this mission! Torpedoed!