Worst "oops" moments in PBW?

[FadingSuns]

Allright, this isn't a PBW moment, but I have to add something to keep this discussion going. My worst moment happens in tactical combat. I'll use the formation order to close with the enemy, usually as 'close double wall', and then clear all group assignments once weapons are in range so my ships can do this 'missle dance' if necessary or just pound an enemy from a distance. All to reciently I forgot to clear orders and watched in helpless horror as my defenceless PDF ships moved WELL WITHIN range of a planets crappy DUC defences when my fleet leader made a 45 degree turn. What started out as a great strategy turned into a turkey shoot. I was planning on capturing the planet intact and using it to resupply my fleet. I ended up almost glassing the planet just to survive the fight and having my invading fleet limp home for repairs. I'd like to say that was the only time I've made that mistake...