Return of the Jedi
According to Supershadow's list Luke is the most powerful Jedi in history. And yet up against the Emperor Luke gets jazzed with Force lightning and all he can do is cry for his daddy. He can’t even repel it back like Yoda. I mean seriously, what’s the point in acting-up all bad-ass Jedi in your black clothes if you can’t stop yourself getting fizzed by an aging Emperor’s electroness.
Even Windu manages to deflect it with his saber in Revenge of the Sith and he's only ranked sixth most powerful Jedi ever. And if you're thinking that in ROTJ Luke is still a relatively junior Jedi, I say, you’re either a Jedi or you're not. If all you need is some nominal fencing skill and mind-powers that don't work on most people then that makes me a Jedi.
Judgment on The Force: Lady-boy weakness
Attack of the Clones
Here we go with yet another Jedi battle that results in the baddy getting away due to The Force being all rubbish. It's Jango vs Obi-Wan. Now ok, Jango's got a suit of armor filled with cables and rockets, but seriously. Obi-Wan should be able to Force chuck his ass all over the place. What happens is (yawn – again) a fairly even match with both guys disarmed and at one point and Obi-Wan resorting to a mash-up of kickboxing and breakdancing.
Again, as SLAVE-1 takes off (if The Force Unleashed is too be believed) why doesn’t Obi-Wan pull it out of the sky with his powers? But no, he's too busy running about in the rain losing his lightsaber and tripping over his big stupid damp cloak.
Judgment on The Force: Predictable fail