Soundtrack to a Mystery Solved

The other day, we were sitting on the couch during Cadence's nap, when we heard this strange sound:

Woooooosh, whooooooosh.

(silence)

Woooooooooooooosh.

(Silence)

me:  what the heck is that sound?  is the heater broken?

Woooosh wooosh wooooooooosh

(silence)

Whoooooooosh

(silence)

Wooooooooooosh whosh whosh whoooosh 

Pepper:  grrrrrrr...

(silence)

WoooooooooshGRRRRRRRRRRRRRRR

grrrrrrrrrrr

woooooooosh whoooooosh GRRrrrrrRRRRRRRRRRRR

woooooooooooooooshwhosh whoshBARRRRRRGRRRRRRRRRRR

wooohshGrrrrrARRRROUUUUU!!

me:  what the heck is going on?!  pepper hush, you're going to wake the baby up!

WoooooshGRRRRAAOUAOAUAUAwooooshGROrRRRRRROWUBOWOWOWOW!Pepper!

Whooosh WAAAAAA!barooooYou woke the baby barooo barroooooowhooooshGRRRRBAROOOO! WAAAA!

...so, attempting to distract the now groggy and grumpily awakened kid, we follow pepper's alerts and look out the window to see this:

Had I not been so distracted trying to keep pepper from waking cadence, I probably would have noticed the giant hot air balloon right outside of our living room window a little sooner.