ok don't know if its new but here we go....
CLUSTERBOMB
select the checkpoint3 from other cover...
stack about 10 in eachother
put the physics object from urban buildings(kiosk l 4) over the top
and a explosive to set it of.......
when you shoot the explosive it will start launching barrels all over the place +6 grids when done correct.....

its a new version of the stored energie glitch discovered(i think) by ktuludarklord from b3e (radio tower glitch)
have fun..........................