Simone Biles

Zac Efron stuck his landing in Rio, and immediately hooked up with Simone Biles ... moments after she nailed down her 4th gold medal. The timing is no accident -- Simone crushed hard on Zac and the two exchanged some flirty tweets after The Final Five won gold in the team competition. Next thing…

In case of a potential emergency, Simone Biles and the USA Gymnastics team know exactly what to do -- GRAB YOUR GOLD MEDALS AND RUN!! The Final Five must be really attached to their shiny new hardware after dominating the all-around gymnastics finals at the 2016 Olympics in Rio ... 'cause when a…