This is a minor edit of Badspot's Prepper. It creates a 1/4 chance the face will make PainCrySound, and a separate 1/5 chance Prepper will spawn for a moment, staring at the nearest player. It will disappear between one and five seconds afterwards.
http://www.host-a.net/u/MegaScience/Support_Prepper.zipEdit: I put the %say to use. When one spawns, the message centerprints.
Edit2: Badspot JUST updated. Let me update.
Edit3: Updated for most recent version.
Edit4: No longer overwrites the entire command, so you can use this if he updates it again.