The former Real Madrid man took advantage of a break during a session to show his scant regard for the laws of physics to find the net with a wonderful strike.
Ronaldo and his team-mates were stood behind the goal as they waited to get started on the next exercise, but that didn't stop him from finding the onion bag.
The star grabbed a nearby ball and hit it on the volley with the outside of his left foot.
What happened next was to be expected as the ball bounced a couple of yards in front of the goal before spinning back into the unguarded net.
Safe to say Ronaldo's team-mates were suitably impressed, with Dybala in particular sporting a face of utter incredulity at the strike.