A normal morning ...
Until Whitey goes completely FRAP, charging from the hall through the bedroom to the back picture window and leaps onto the three foot cat tower at the window hard enough to make it slam into the window sill, which in turn causes Billy to leap from the tower to the bed to save his own furry self.
Billy then charges across the bed and out the door as Whitey reverses course and barrels out of the room after Billy, leaving the cat tower teetering from all the feline forces applied to it.
The tower slowly tips and falls to the bedroom floor with a boom.
Estimated elapsed time from entrance to exit, perhaps five seconds.