"Grey's Anatomy" Season 10, Episode 16 spoilers focus on Japril. Jackson (Jesse Williams) and April (Sarah Drew) take the wrath of Catherine Avery (Debbie Allen). Grey's creator Shonda Rhimes said on Twitter she is "very excited" for this week's new episode. Is it just the Japril drama, or are there surprises coming up?

Spoiler alert: This feature contains spoilers on Grey's Anatomy Season 10, Episode 16, titled, "We Gotta Get Out of This Place."

Without dishing any details, Shonda Rhimes tweeted she is "very excited" about the new episodes of Grey's Anatomy Season 10 and her other Shondaland baby, "Scandal." The next Japril drama is probably only one of the reasons why she's excited. Fans will find out soon. Episode 16 airs Thursday on ABC.

Catherine Avery has some legal matters to discuss with the newlyweds in Grey's 10x16. And she is not playing nice. (Watch ABC's promo video on YouTube.) One, Dr Avery feels slighted that her son got married without seeking her blessing. Two, her new daughter-in-law April left a man at the altar hours before marrying Jackson. Will Chief Webber (James Pickens, Jr) have a say on this family matter?

Watch the Grey's Anatomy 10x16 promo video to see Debbie Allen play the role of a monster-in-law. April Kepner can hardly believe what her new mum-in-law wants her to do. Jackson Avery walks out on his mum, leaving Kepner in a hot, burning seat.

Meanwhile, Chief Webber is celebrating his "retirement age" birthday in Grey's Anatomy Season 10, Episode 16. Speaking to TVGuide.com, Pickens, Jr. said Webber gets the feeling that he is being forced to retire. However, the former chief is not ready for that big change.

"Richard is no different than anyone else. He's not happy with it. He still has something to offer," said the actor playing Chief Webber. It is probably not a coincidence that Catherine Avery is in the show in time for Webber's birthday. Something special must be unfolding in Grey's Anatomy Season 10, Episode 16.

Meanwhile, check out Jessica Capshaw's Twitter page for photos of the special effects done on Arizona's prosthetic leg. This set of Calzona photos is a fan favourite.

WATCH: Grey's Anatomy Season 10, Episode 16, 'We Gotta Get Out Of This Place' (ABC Promo on YouTube)

Grey's Anatomy Season 10, Episode 16 brings the medical drama closer to the season finale. ABC has recently announced the finale will air on May 15. Caterina Scorsone of the Grey's spin-off "Private Practice" is to reprise her role as Derek Shepherd's (Patrick Dempsey) reported before this season ends.

We shoot the scene with my own two legs and then @scottLA1 figures out how to make my legs look like Arizona's legs. pic.twitter.com/5sEj2IJANp

— Jessica Capshaw (@JessicaCapshaw) March 14, 2014

Grey's Anatomy Season 10, Episode 16, "We Gotta Get Out Of This Place" airs Thursday night on ABC.

Very excited about the #GreysAnatomy and #Scandal episodes airing tomorrow night! #shondalandthursday — shonda rhimes (@shondarhimes) March 19, 2014

Watch More TV Guide and Spoiler Features

'Grey's Anatomy' Season 10, Episode 15 Spoilers: Shonda Rhimes Teases Calzona Special, Jolex Deals with Baby? [Watch Promo Video]
'Grey's Anatomy' Season 10, Episode 13 Review: 'Take It Back' Surprises, Sarah Drew Hints What's Next for Japril [Watch Promo Video feat. Jolex]