Create A "slide" Effect In Concert Band

In film scores oftentimes, you can hear really cool sounds, and sometimes a wonder how they were made.  I know a lot of the time, composers will use electronics to augment the orchestra's sound.  (That's why band arrangements of Hanz Zimmer in my opinion are pretty lame.)  

There's an effect that Alexandre Desplat uses in The Deathly Hallow.  It's a slide from one pitch to another.  You can hear it in the song "Snape to Malfoy Manner."  You hear it for the first time at 0:51 in the strings.  

I'm wondering if anyone knows of a way to make it happen in a concert band setting, besides using a trombone glissando.  I'm open to anything.  Obscure percussion instruments, pulling out tuning slides.  I don't know.  

Also, is this slide in the recording possible on stringed instruments, or was that a computer?

Thank you so much for you time in advance.

It's just a half-tone glissando. I know horns can do it, clarinets can, and probably trumpets as well. Not all brass players might know how exactly though...

Yeah flutes and clarinets can do that, though I played clarinet for 9 years and I never learned how. As Max mentioned that glissando is half-tone and should be easy to do on a string instrument.

Edit: Here is a good example of string glissandos, around 2:20, and in movement 2 of Maslanka's "Quintet for Winds No. 1" there is some pitch bending, if it helps.

Yeah that's basically a glissando (or portamento) on strings...pretty easy to do. I'm pretty sure flutes, oboes, and clarinets can do it too.