Link to sound file: https://www.mediafire.com/?8fe2fwrhpga9pao
This is the sound effect the Gaster Blaster makes when sans summons it.
All content used in this video is owned by Toby Fox. I am just here to share this sound effect. Subscribe if you wish to see more Undertale/TF2/Smash Bros shit. Or not.
It doesn't really matter...tra la la.