When you realize you've become exactly like your own dad
Caught myself saying to my son 'money doesn't grow on trees' and 'we'll see' when he asks for stuff and honestly I sounded just like my dad 20 years ago. Then I laughed at my own joke at dinner and got that same disappointed look from my wife that my mom used to give my dad. The cycle is complete.
Haha the 'we'll see' defense. I caught myself doing that exact thing and my son called me out on it. Now when he asks I at least give him a straight yes or no instead of delaying the pain.