Things I am used to thunder sounding like: explosions, cannon-fire, distant rumbling, far-off grumbles, a hammer on a sheet of metal
Things I am not used to thunder sounding like: two sharp knocks as if someone was trying to get me to open the window
Storms probably shouldn’t sound like they’re trying to convince you to let them inside, just saying. I’m on to you, thunder.
And there it goes again! One-two bang, like the way I knock on doors.