CAPTION THIS!

This week, reports had it that Rihanna was bitter when she took Jay-Z by the hand at the Grammy's and he pulled away. The incident occurred when they walked up on stage to accept her Grammy for Best Rap/Sung collaboration for Umbrella. But Rihanna appeared to be still salty when they were both spotted at the Entertainment Weekly Grammy afterparty Sunday night, just before she crashed out of there with her fella Chris Brown:

So what was their intense altercation all about? And what caused Rihanna to contort her face in fixed rage? Folks, it's time to CAPTION THIS!