Physical Pranks
Slippery Slope of Descent
Convince your friend to take a series of increasingly steep stairs, culminating in a tiny, almost imperceptible step.
Reverse Glass Door
Place a clear glass on a door, and then remove it, only to have your mark wonder what's going on.
Verbal Pranks
Overly-Complicated Sarcasm
Convince your friend that the opposite of everything they say is, in fact, the truth.
Indignant Impersonation
Perfect an expertly deadpanned impression of a grumpy authority figure, and watch the room fall silent.