Timothy Thicke peered through the binoculars, watching as Evan Edgelow lobbed a smoke grenade.  He paused a moment to wipe condensation off  the binocular lenses.

When he looked back, Edgelow was gone.

“Mission accomplished,” Edgelow whispered from beside him.

“How do you do that?!” Thicke asked, amazed.

“Optical illusions, mostly.”