Jon's Grandmother Takes A Fall!

Uh-oh! That's not good.

Jon Gosselin tweeted "Family Day!" on Saturday, where he and his relatives spent the day with the kids. "So great to see so many generations together," he added.

But apparently that's when the accident occurred, because Jon tweeted Sunday morning: "Just to clear up any faulty reports: my grandmother did in fact fall in my driveway but she'll be fine. Thank you for all of the concerned calls."

We definitely hope she's okay!