i must admit, i love the stormy stuff! the best you really can do is to just imagine the funnel coming at you, then whirling back to the sky, i tried it and im not sure if it did work but i saw a funnel at school and i did the above. no sirens went off, it was a supercell, it did whirl, i was outside for gym running, the siren sounded a while before because of a ten mile away but it didnt sound a siren again, and noone i know was injured. i cant be sure, but its best not to go TOO extreme.
i really hope this helps