You know my theory? Go on. It comes in streaks. Gotta be willing to push your luck when it's hot.

你知道我的理论是什么吗？说！好事成说，运气好就要趁热打铁。

youdao

The taxi driver who finally chauffeured me home was pleasant enough, although a stark notice on the back of the seat reminded me that it would not be wise to push my luck.

BBC: In Paris, the customer is not always right