The riffs were funny, but you almost have to feel sorry for the clowns "acting" in this movie. I hope they kept their day jobs.

A giant lobster?!?? An effect so pathetic, even J&TBs couldn't stop themselves from laughing.

They kept their day jobs.... "WITH TORTURE!"

Loved the convenience of renegade alien finding a room for rent at the house who's dog was disintegrated. Still, not bad since there were lots of people vaporized, a giant rock LOBSTER, and inter-species romance (eww).

One word: TOR-CHA!! (torture with heavy emphasis)

A co-worker with a slightly bent sense of humour
counts the non-MSTed version of this film as one of his favorites...largely because of the thirty-something 'teenagers' and their habit of zapping humans for no particular reason.

even without Joel and the bots (tho it's always hilarious with), this film is so laughable, including: highly enunciating spaceman, disintegrator ray, plot convenience at maximum level, crappy Gargan monster (good with drawn butter), and lots of skeletons. Although made in 50s, there are lots of deaths in this one.

Really funny MST skit with the cool Skull ship which amazes Joel, Tom and Crow.

Great Lines:

Gas Station Attendant: "Whatcha in town for, mister? Convention or something?
JOEL: (Thor) "I'm a Trekkie!"
"Wesson oil on a wound?" "She's not Florence Nightingale, she's Florence Henderson!"
"Your desk embarrasses us."
"If he dies they can make soup."
"Why do you look like Hoyt Axton!?"
"Grandpa, I bought that Nyquil for colds, not so you can make Nyquilottas!"
"He's spritzing all over him."
After one of the G-men is zapped into a skeleton: "Go hang Bob in my office."
"Wait, I just want to say I killed your dog!"
"I have never piloted swim trunks before."
"It's the New Zoo Revue..."
"It's the Elephant Man in the 26th century!"
"Super Nurse Osbourne!"
"I'm givin' it all I can, Captain!"

Re:Spinoffs
The Canadian games company Talsorian, published a role playing game, called naturally enough, Teenagers from Outer Space, based largely on this movie in the late 80's/early 90's....
They reissued it a couple of years ago....

And I bet playing it is pure TORTURE!

Re:Last Comment
Not if the ref's doing his job right...
(Mind you, it helps if your character has a high Bonk (hit point) Stat to begin with, as you're going to need it....).
And as for the Alien Control Officers,("People In Black", so to speak), just wait until they start quoting the provisions of the Tycho Treaty at you....