I know it's been said a thousand times before but now I'm gonna say it. Whoever decided putting landing gear and boost on the same button was a good idea, is a one watt. Just cost me 1.2 mil and I only had 2.2mil. Infuriating.
Was it at a station ? Put your landing gear down before you go in the slot, esp. if you've got a dodgy Xbox controller where buttons are temperamental.
Actually I was outside the slot. Smuggling run where I couldn't get scanned so I had all modules, including shields, off. Approaching slot at speed, tried to put gear down to get me below 100 and somehow missed direction pad and busted my buns right it into the wall next to the slot.