Use it to highlight the moment when actions truly matter, often under pressure. Everyone's friendly when things are easy, but when push comes to shove, you'll see who your real friends are.
Pro Tip 2/3
Serious Decisions
Indicates a situation where one needs to make a serious or definitive decision. She's undecided now, but when push comes to shove, I think she'll choose the right college.
Pro Tip 3/3
Tension Increase
Suggest a situation escalating to a point where a response cannot be avoided. I avoid arguing, but when push comes to shove, I will stand up for my beliefs.