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.....

I've got something like that that in my Any old Iron and Suburban Metal maps. Those checkpoints surround a big propane tank and have an awning on top, so when you shoot at it, barrels go flying and the awning disintergrates. It looks good throwing a lot of debris about.
The placing of several of the checkpoints in the same place sounds very interesting though, i may use that one day, maybe with a repeting effect using the gas pump so it goes off on it's own after the first activation. That'd freak people out very much, lol
