There are two general kinds of compels: events and decisions.

An event compel is something that happens to a character because of an external force. That external force connects with the aspect in some way, resulting in an unfortunate complication.

A decision compel is internal, where the character’s flaws or competing values get in the way of better judgment. The aspect guides the character to make a particular choice—and the fallout of that choice creates a complication for them.

In either case, a resulting complication is key! Without a complication, there is no compel.