Originally Posted by Milskidasith
It's a line (or ray, now)... you wouldn't be in the explosion at all if you dropped it (assuming it was pointed at your enemy, anyway).
Placing it is not the same as detonating it. You'd have to drop it (free), set it (standard) and then detonate it. Doubt you could do that as a move action.
If you drop it to detonate it then you haven't placed it so it's a burst.
Either way, there isn't a problem.