What an unlikely but sweet story!
According to TMZ, Lopez floated about
Aaah! Julia Roberts doing the Pretty Woman laugh for real just made our day!
But the best thing about Jimmy Fallon and the Erin Brockovich star slamming balls into each other's faces is the looks of sheer terror!
And in the slow motion, that's a long, suspenseful moment!
Ch-ch-check out the video (above) to see what Julia calls "the comedy version of Fifty Shades Of Grey!