Stingers?

[Ortega]

What Bayish Stingers does Transformers give us?

[David]

Optimus Prime actually saying "My bad". But I've only seen the movie once so I'm sure there are better ones. The scene where the mom asks right out if he's masturbating might work too. (I believe that line was taken right out of the original children's cartoon).

[Crowmeus]

Ratchet's line about Sam's pheremone levels.

[Raven]

"This is a 100 times cooler than Armaggeddon?"  or whatever the number was.

[Darth Geek]

Bumblebee "peeing" on John Turturro.

[Crazy_88s]

George Bush asking the flight attendant to get him some ding dongs. 

[Rufus T]

The large gentleman crashing through his own sliding glass doors.

[Indomitus]

Either the dog "lubricating" the robot's foot, or Bumblebee doing the same on John Turturro's head.  Or both.

[RoninFox]

Jaz's "What up bitches" or Prime's "eBay" line

[uruseiranma]

I figured that strange point after Mikaela introduces herself to Sam's parents and Sam's Mom gives that strange giggle and shakes Sam by the shoulder. That'd be a perfect stinger. Kind of like Voldar's 'laugh' stinger at the end of 'Santa Claus Conquers The Martians.'

[Pak-Man]

How about Fox's proclamation, "This car is a good driver."

[Fifthrate]

John Tuttoro's eyes peeking through the mailslot.

[kodiakthejuggler]

Hot girl: "Do you think I'm shallow?"

[Danecho1967]

Yeah, I know I'm necroposting.  Sue me.  Fact is, I couldn't believe that this wasn't mentioned as a stinger.  For my money, the worst single moment of this awful, awful film.

[Miku Fan]

"I'll fuck you up worse than a performance of Cabaret!"