Ryan McAvoy said:

Bingowings said:

Sorry I should have said relies on rather than trusting.

His 'improvisation' hinges on Artoo being up on that barge balcony and is made more convenient by all the other characters being where they are.

If that didn't happen The Empire would have won the war.

See bonkers insane luck all round.

You might as well said invisible wizards did it.

You don't think luck plays any part in...

- ANH - garbage masher sequence.

- ESB - Luke just happening to fall out the bottom of Bespin so Leia could rescue him?

There is luck in Threepio turning his phone on in time (well within the realms of plausible luck and excusable dramatic license) but the rest is Artoo's skill and the Bespin thing is down to Luke communicating via the Force to someome we later learn is Force sensitive herself.

So the layers of luck are much less than in that sequence.