CSB Fireworks puts on a celebration. It schedules a series of bursts, each an TE_EXPLOSION plus a TE_SPARKS tempent at a random point above a random player, with an explosion sound played to everyone. It runs automatically at round end (great for a holiday event or a match win) and can also be launched on demand with amx_fireworks.
csb_fw_roundend) and the amx_fireworks command.csb_fw_bursts controls how many bursts go off, spread over time.sprites/zerogxplode.spr, weapons/explode3.wav) - nothing extra to install.csb_fireworks.sma and copy it to addons/amxmodx/plugins/.plugins.ini and change the map.amx_fireworks needs the ADMIN_LEVEL_A flag (b).