What are my neighbors doing?

That's the name of my game today. Help me figure it out.
They are loud.
They are downstairs.
There is a sporadic loud thumping sound.
Are they jumping up and down? No, probably not, because the sound reverberates, it's echoing off the floor. Are they throwing something on the wood floor? Must be, not that carpeted part. Wouldn't make this noise.
Maybe it is an exercise machine? But the timing is off.
It might be a ball, like those heavy balls you used to throw in dodge ball.
Seriously though, what are they doing. Thump, thump thump.

stores

I'm pretty sure I saw a brand of soda (or as it's called here pop) named:
Hillbilly Holler or maybe it was Holla.
Why I don't have my camera on me for moments like this is beyond me.
I saw it on the shelf, I think it's a store brand at Fareway. Not to be confused with Fairway,
which is apparently a trendy East coast chain. (I just read a whole NY'er article about different
upscale supermarket chains). The one here is more like an aldi's/economical type chain. Nothing wrong with that. I like to compare the best prices for avocados across the lines... except sometimes those "bargain" ones, even though they seem like a great deal, take about 4 weeks to ripen..hmm