'Grey's Anatomy': Lies, Sweat and Tears, Go Inside the Boards (Exclusive Video)

The board examinations aren't going to be a walk in the park for anyone on ABC's Grey's Anatomy.

During last week's hour, Cristina (Sandra Oh) finally told Meredith (Ellen Pompeo) about Owen's (Kevin McKidd) betrayal, while on the other side of the door her best friend battled the stomach flu. Meanwhile, a stressed out April (Sarah Drew) dealt with the pressure in a new way, losing her virginity to her BFF, Jackson (Jesse Williams).

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So how did Seattle Grace's best and brightest fare on the big exam? Not very well in a clip from Thursday's episode, titled "Let the Bad Times Roll," exclusive to The Hollywood Reporter.

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A confident Cristina finds herself being challenged by her proctor, played by St. Elsewhere's William Daniels, while Meredith's stomach continues to rumble -- much to her examiner's chagrin.

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Meanwhile, Jackson can't seem to let go of his worry about April, who has perhaps the worst -- and funniest -- experience of the foursome.

Check out the clip above and hit the comments with your theories as to whom you think won't make the grade. Grey's Anatomy airs Thursdays at 9 p.m. on ABC.

Email: Lesley.Goldberg@thr.com; Twitter: @Snoodit