One thing that's always seemed not quite right to me during the Bespin escape is right after the Slave I takes off. C3PO says "Chewie, they're behind you!" and you can see Lando in the background chilling out and stretching or something, then suddenly laser blasts fire, completely missing these stationary targets and then they all jump out of the way and start running again. It makes the stormtroopers seem even more incompetent.
I know there's this "nobody ever listens to C3PO" thing going on throughout the film, but it might make more sense to delay his line delivery slightly if possible, so that it looks like he warns them and they start moving again just in time to avoid the blasts, rather than have them snap out of it and take off after a few rounds completely miss them when nobody's even moving.