Has anyone else experienced this?
That second when you realise that you really can’t just wing it, and you actually have to calculate something, or take it more seriously.
Buying a few rolls of insulation for the loft, then having the moment of “wait, this isn’t just two rolls worth, I have to actually add this up, and order for delivery”
Loading up the car for a trip to the dump, then noticing that it’s riding a bit low, and finding out that 9 bags of rubble is actually 50% of the total kerbweight.
When I used to fly the quadcopter, I often considered whether a very long piece of string tied to the feet would make my life easier.