I didn't expect to run in to you here!

When rounding a corner in your office or other hallway where bumping into people (in the literal sense) is frowned upon, try dragging or slapping your heel on the floor as you approach the intersection.

This subtle signal will alert your officemates to your presence and may avoid a dangerous, embarrassing, or career-killing collision.

You might also whistle, jingle change in your pocket, or recite lines from Office Space or Monty Python and the Holy Grail.