Luke's Lack of Faith!
In the swamp scene in Empire Strikes Back Luke under the watchful eye of Master Yoda attempts to raise his ship out of the murky waters!
Lifting it a mere inches before it sank back down even deeper than before Luke quits without so much as a second try!
If that were you wouldn't you have been at that all night giving the fact that you at least lifted a decently sized ship just a little bit?
HEY... if I am just a few inches away from a world record bench press let alone getting a heavy ship out of muddy waters then I'm driving Yoda crazy with my all nighter second... third... fourth and 100th try!
LUKE: "One more time YODA! I can do this!"
YODA: "LUKE! Sleepy I am getting over here!"
LUKE: "Just one more time! READY? GO!"
(Ship rises a little and then sinks even further down!)
LUKE: "@#%&!"
YODA: "JEDI cuss not they do! Cuss only Sith do!"
LUKE: "Sorry! One more time! I can do this!"
YODA: "Never mind Luke! Do this myself I will! Crazy you are driving me!"
LUKE: "CRAZY! Isn't that Darkside talk!"
YODA: "SMARTASS you are! As is the father so is the son!"
LUKE: "WHAT!"