51.   The man then reached into his case, flipped a switch and ran.

52.   The researchers can, through a burst of an electric field from a tip of a scanning tunneling microscope, deliberately flip one switch at a time.

53.   The switch was flipped.

54.   Then some invisible switch was flipped, and the Lakers quickly morphed into the Lakers of old.

55.   Then an encounter with something in the environment flips the switch, turning on the hypersensitivity.

56.   Those wishing to see the Rockets flip the switch and show they still have what it takes to hang with the big boys were sorely disappointed.

57.   This clearly flips his switch.

58.   Thus attired, I hauled the Shop Vac into the living room with a step ladder, set everything up and flipped the switch.

59.   To minimize the chance of damage to envelopes and other special stocks, you can flip a switch to choose an alternate straight-through paper path.

60.   Waiting for them to flip a switch?