When you’re done watching the above Vine, watch the below Youtube clip very closely.
What appears to be a shocking dive at first glance and at the above angle, was acutally a foul – Ronaldo was clipped.
Pause the video below on 7 seconds, and you can see that the Celta player accidentally clips him, causing Ronaldo to trip over.
When you’re running at that speed, the slightest clip on the foot can easily knock you off balance.
Ronaldo’s being slated for diving here on Twitter, which is unfair, but understandable if you only see the Vine.