VIDEO: Did Rondo almost trip Deron Williams from the sideline?

What's going on over there, Rajon Rondo?

During the Dallas Mavericks' buzzer-beater, double-overtime victory over the Sacramento Kings, one Twitter user noticed Rondo doing something a little sneaky with his foot from the sidelines while Deron Williams had the ball:

Let's take a closer look:

Makes you wonder.

- With h/t to SBNation