Like most babies, Isaac makes noises. Cute gurgling noises. He also makes parping noises. (You know, bottom noises.) Sometimes he'll laugh and coo.
And sometimes (and by sometimes I mean quite often) he'll make, uh, this noise.
He'll do it for hours, and then when his voice gives up, he'll slap the crap out of anything nearby, or grab it and eat it.
The cat has spent an awful lot of time hiding.