on second thought

On second thought, no: that would be like trying to count every pine needle in Yosemite.

But only two hours after this promise, Linn says the landlord texted to say: "On second thought, I want you to move out."

“On second thought, I will make a deal with you.”

What began as a flippantly offered pipe dream, on second thought sounded too good to resist.

On second thought: Donald Trump backed down from delivering his own closing argument in his civil fraud trial.