It's storming outside. Each of us 3 cats has a different reaction. Myst thinks the sky is falling and hides under a sofa or in the deepest darkest corner of the house until the sound stops. Dandelion enjoys watching it out the window (he can not hear, so the storms do not bother him as much and he enjoys the look of things).
As for me, I want to be around my pet humans and get lots of brushing. Hmmmm, come to think of it, that is my reaction to just about anything, although I find really loud thunder is annoying.