The switch happens on each level-up or upon using certain items.

As they later learn, the switch had already happened and the suitcase is full of heroin.

This switch may happen only once in the player's life.

This switch happened in the 1930s or early 1940s; however, the exact year is not clear.

For me the switch of bass players happened at just the right moment.

Jack's switch from law to medicine does not happen in the novel.

"I wonder where the light switch might happen to be?"

Doubleday, who did not return a phone call seeking comment, said the switch could happen in the next year or so.

The switch will only happen if Dexter decides he's had enough.

Bottom line: The question is when, not whether, the switch will happen.