Difference between a story beat and a compel?
I was contemplating about the plot and scenes for the future session, I was thinking about doing this:
One of the PCs has an issue of that one evil faction Xolla has a vendetta against him. Xolla was foreshadowed a few sessions ago and wasn't the main focus on the current short story, so by the end I wanted to create an ambush onto the party during their mission against another evil faction Zetta.
This would give me an opportunity to introduce Xolla as a tangible enemy finally and provide some leads for future adventures and foreshadowing another Big Bad.
However, it seems like a compel, an event compel in particular. And couldn't the player just pay a fate point and say, actually, that there's no ambush.
The player in the moment may not think that it's something of importance or that I can create future adventures from this event and provide leads for the current story line?
Should I just force the event and pay a fate point to the player or anyway? Or how is it handled?