Heres an Ultimate Sound plugin for you and your users to enjoy. Users are limited use by 120 seconds w/ an additional cuss or hidden sound feature.
Ultimate sound pack found here
http://rcon-post.com/amxx_sound_pack.rar
Code:
#include <amxmodx>
#include <amxmisc>
new bool:cuss = true
new Float:SndFreq1[33]
public plugin_init(){
register_plugin("Ultimat_Sounds", "1.0", "Jeremy")