I made 2 versions, there is no change in frame rates but I like the 1st one better cuz you can see better oOo: but if you want realism then go for the 2nd rock:
version 1 :
[img]http://img23.exs.cx/img23/7080/flamethrower6zz.jpg[/img]
version 2 :
[img]http://img102.exs.cx/img102/3830/shot00004eh.jpg[/img]
[img]http://img102.exs.cx/img102/9288/shot00039or.jpg[/img]