@Sir_Named I just tested again. Seems like you can throw from anywhere inside its radius except the edge of the outer ring(where the ultimate still recharges your shields) but blocks friendly grenades(going outwards). Interesting, so that's why it keeps on intercepting friendly nades/caustics gas ultimate, etc. So if you stand on the edge of the outer ring(last point where ultimate works), it will destroy friendly ordnance. That's kinda messed up.