Enter this into your scripting engine access and you'll be able to make a really big blast of lightning.
if(getMouseDown() && bnot(oMouse),
playSound("shock",100)+
assign(rr,random()*500)+
assign(n,200)+
assign(t,2200)+
loop(t,shock(getXMouse()+sin(n/t*500+rr)*50,n/t*400)+assign(n,n+1)
,0);
oMouse = getMouseDown()