Assembly blunders! Care to share those silly mistakes you made while assembling models?

So... I was just assembling a bunch of Chaos knights for AoS and apparently, while snipping it off the frame, I cut off a bit that's attached to the peg to give it stability on the base, so now I have to balance the bare hooves on the base; which aren't exactly flat (so it likely will snap easily in transport). It's not a major mistake... but I'm sure we all had our share of "Oh f\*ck... how do I fix this?" moments

The worst of it all... I got hold of a start collecting box, so these models are easy to build and don't require glue; and it turns out, I can't even build those properly, lmao

How about y'all... Glue the roof on a vehicle before the side went on? Glued torso's together while the head had to be put in first? Where did you royally mess up while building mini's?