[kirtar]

You can score the opposing alliance's supercells (I think this was mentioned at kickoff), although with 20 seconds remaining, even if it misses, there's going to be little room for error for the other team, since they now have less than 20 seconds to move to the ball, acquire it and also score it, since the payload specialist has to react to the 20 second warning, possibly grab the cell, and throw it, and then the cell has to land. If you're really worried about it, just toss it with like 5 seconds to go so they have essentially no opportunity to score with it.