Effect for spawning monster in game ?

I want to reproduce the effect like in doom 3 when a monster spawn.

Any suggestion what can I use ?

there is my remake for E1M1.

http://img143.imageshack.us/img143/1748/test0000.jpg

I can only suggest a point_tesla but that more replicates the effect on half-life oneā€¦ I hope you find something :S

Thanks for the idea, some one can help me to make the Npc appear when the tesla touch the ground.

Good idea

Any one ?

Nice one !! I try to do this.