updated 04/24/2014 AT 8:00 AM ET
•originally published 04/24/2014 AT 9:00 AM ET
Diaz visited The Tonight Show Wednesday and talked about her love of pulling jokes – even on newborns.
“She fell asleep first. That’s what happens when you fall asleep at a party,” Diaz said. “She’s a baby!” Fallon responded in mock anger.
As it turns out, Diaz pulled the old “hand in a cup of warm water” trick on little Winnie.
As we said, no one is safe.