public Coords returnRandomFreeSpot() {
Coords result = new Coords();
do {
result.x = Detonator.INSTANCE.rng.nextInt(storedWidthInTiles) + 1;
result.y = Detonator.INSTANCE.rng.nextInt(storedHeightInTiles) + 1;
//Log.info("Pick random spot: "+result.x+"/"+result.y);
} while (Detonator.INSTANCE.tileMovementCalculator.isBlocked(result.getIntX(), result.getIntY()));
return result;
}