To laugh or to yell: that is the question

The kids are outside playing with the water hose when I tell them it is time to clean up and come in. I ask Toria to clean up the bubbles and Tomas to wind up the hose onto the hose reel thingy.

Tomas is standing at the hose reel holding onto the hose while Toria is still holding the nozzle end from spraying a bug in the swimming pool. (Do you see where this is going?)
Tomas starts pulling on the hose.
Toria starts pulling on the hose.
They look at me standing by the window watching them. Tomas yells "We're having a tug of war".
Tomas starts winning.
Toria grabs the nozzle and sprays the motherlode of water onto Tomas.

How can one admire her quick thinking and yet not yell because what she clearly did was wrong?