For some reason, this frog screams like a banshee to make a point.
Maybe it's scared or maybe it's just using its words, but it's making a racket you can't miss. Hopefully you'll still be able to hear when it's all over.
This looks like a Budgett's frog, which is also known as the "Freddy Krueger" frog, as it'll open its abnormally large mouth and scream when it's frightened.
Is that what this is? I don't know and I don't care. I personally never want to see or hear one of these things again.