Gibbs was beyond confused, all he had wanted was a quick background check on some suspects they had detained at the crime scene, a Sam and Dean Winchester. What he hadn't expected was Abby rushing out of the lab and up to the bull pen where Dinozzo was checking them in.

He most certainly not expected her to slap the tall one, Sam he thought.

And he had most certainly been completely shocked when she had then whipped around a chair, stepped up onto it, and then proceed to kiss him...fiercely...for an extended period of time.

Then of course she goes and makes it all even more confusing by asking,"Where's Cass?" Who in the blazing HELL is Cass?

Yes, Abby certainly had some explaining to do...but not until after Gibbs had cleared his head.