As anticipation grows for the season finale of ABC's Grey's Anatomy, sneek peek video clips released reveal what kind of mayhem the major storm is bringing to Seattle and specifically to Grey Sloan Memorial Hospital.

Fans saw Arizona Robbins lock lips in the on-call room with someone other than her partner Callie Torres. Robbins made out with the hospital's newest craniofacial specialist, played by guest star Hilarie Burton, and though Robbins tries to avoid her afterward, the Superstorm forces all doctors at the hospital to help as much as they can. The two doctors continue to cross paths, leaving viewers wondering if Robbins will tell Torres that she cheated on her. Robbins is noticably uncomfortable around Burton's character, hinting to the fact that she regrets cheating on her partner.

A second clip from the Thursday finale, titled Perfect Storm, shows a school bus speeding toward the hospital and eventually flipping on its side and then catching on fire. While all of that happens, the hospital is dark, with the power being cut off from the storm.

Watch the spoiler videos here.

The promotional trailer for the May 16 finale shows the storm even affecting Meredith Grey's delivery, with there being a chance that a C-section will have to be performed in the dark. The show's executive producer, Shonda Rhimes, admitted that Grey's delivery will not be pleasant.

"As darkness falls," the video's background voice says, "chaos ignites."

The season finale of Grey's Anatomy airs Thursday, May 16, on ABC at 9 p.m. ET.