If the claw comes in at a really oblique angle to the surface of whatever you're trying to grab (which is especially a problem for round objects like tanks), it might not stick.
I build a hill of scrapped boosters over your overpriced hill, slashing the price to 5 dollars. Then I buy your hill for 5 dollars. My hill of scrapped boosters on top of a hill that is also mine.
The rocket fails 1 second into launch. Because this is KSP and explosions don't do jack, I survive unscathed. The next poster finds him/herself greeted with a hail of lit SRBs.
Actually, three jumbo jets are sufficient to equal the power consumption of a city. A mainsail could conceivably rival the power consumption of a city-state like Singapore. Someone with better figures corroborate/debunk this.
Flight mode. It's hard to have used HNIKJL translation for most of your flight then switch over to a completely foreign set of controls for the last critical 30 seconds.
There is a reason for this. If your computer memory is full or for some reason your computer refuses to edit anything in your KSP folder, all the F5-mashing in the world won't do jack.