It's nearly impossible for this to happen, but if by the end of the night, Rondo, Bradley and MKG are all Celtics, I'd be bouncing off the walls.
One scenario where that just might work, but still an absolute pipe dream, and likely unrealistic:
1) The top 4 goes: Davis, Robinson, Beal, Barnes.
2) KG tells Ainge he's retiring.
3) Ainge offers Sacramento Pierce, 21 and 22 for 5 and Salmons.
4) Petrie gets so excited about getting rid of Salmons that he forgets he's nowhere near contending and thinks Pierce is a good fit.
5) Someone locks Daryl Morey in a closet somewhere and he can't beat the offer with Kyle Lowry.