another divx
this one shows the "cluster grenade" sub model. .4 seconds before mamma goes off a yellow shell appears and it beeps, sorta like a bouncing betty.
best part is if you hold it long enough and launch it, like the last 2 shots show, the individual clusters will take the velocity of the mamma and apply it to their velocities. oh they are still completely random, and it's tough because a few might fly back at you (and hurt you too), but with practice you can chuck a decent sized lob down the hallway of 2fort and create a wall of clusters going off right at a gunner's face.