Brianna's not jumping

Brianna (at 3 1/2 years old) loves to jump off of just about anything: beds, couches, ledges. So we have to tell her not to sometimes.

Brianna (who was standing on the upper step of a two-step step stool): "Brianna's not jumping."
Laura (in the same room with her back to Brianna): "Okay, good."
Brianna: "No turning around. Brianna's not jumping."
Laura (busy with Jason): "Okay, good."
Brianna: (thump!)