Another musical trio:
HF_4: “Everything I learned about mythical sea creatures, I learned from Cher.”
HF_5: “Everything I learned about knife-fighting, I learned from Sting.”
HF_6: “Everything I learned about delivering alien babies, I learned from Will Smith.”
:smack:
“Everything I needed to know…” that is. Sheesh.
Right Arm!
HF_3 Twister
HF_4 Mermaids
HF_6 MIB (might be II but I have yet to see it)
HF_1 A Clockwork Orange
Missed seeing this until now, and it’s the right one.
Z_11 “Everything I needed to know about blowing up trains, I learned from Peter O’Toole.”
Z_12 “Everything I needed to know about mountain climbing, I learned from Clint Eastwood.”
Z_13 “Everything I needed to know about causing a fire in an apartment across the street by shooting a book, I learned from Charles Bronson.”
Z_14 “Everything I needed to know about pickpocketing, I learned from James Coburn.”
Right on all but HF_1. No orgies in that one. A gang-rape maybe, but no orgy.
HF_1 Caligula!
I_L_4 = Fight Club?
I_L_5 = Good Morning, Vietnam?
Right-o, you pervert! 
Another themed one (guess the theme for extra points):
HF_7: “Everything I needed to know about levitation I learned from Sigourney Weaver.”
HF_8: “Everything I needed to know about living in glass houses I learned from Tony Shalhoub.”
HF_9: “Everything I needed to know about bottlecaps, I learned from Patrick Swayze.”
Total WAG here:
HF_7 Ghostbusters (at least I saw this)
HF_8 13 Ghosts (didn’t see this)
HF_9 Ghost (did see it but don’t recall bottlecaps)
Theme: ghosts – all I had to connect the IMDB clues!
Leaving for the night. See y’all later!
I suck at naming any movie before 1977 Star Wars, so I resorted to Google on some of these:
Z_7 = Ghost in the Noonday Sun
Z_11 = Lawrence of Arabia
Z_12 = The Eiger Sanction
Z_13 = Uh, a Death Wish movie?
Z_14 = Harry in Your Pocket
It’s a sweep!
Production of Television Shows is what is referred to in my clues.
I_L_6 “Everything I needed to know about tropical aquaria cultivation, I learned from Eric Idle”
I_L_7 “Everything I needed to know about hostage situations, I learned from Mel Gibson” Tricky one, That.
I_L_6 = A Fish Called Wanda
I_L_7 = Lethal Weapon (first one)
Oops, I_L_7 is not Lethal Weapon, I was thinking suicide situations. Is it Ransom?
I guess I could put all my guesses in to one post, huh?
I_L_4 = Death to Smoochy (my original guess was based on soap production)
I_L_3 = Tootisie or Wag the Dog
Really, I’m just padding my post count.
Hangers:
HF_2: “Everything I needed to know about William Shatner I learned from Jamie Lee Curtis.” <—Tricky!
HF_5: “Everything I learned about knife-fighting, I learned from Sting.”
A few more if anybody is still playing:
HF_10: “Everything I needed to know about Crom, I learned from Arnold Schwarznegger.”
HF_11: “Everything I need to know about shower curtain rings, I learned from John Candy.”