Cinder is the most common type of pyroclastic, found all over the world. Some hardware stores sell it. It lands solidly, and has many wholes and pockets in it. Sort of like a less hole-y, more solid form of reticulite. This spatter rampart holds very good examples of spatter, if you look closely.
Spatter is exactly how it sounds, when the lava splats onto the ground still in it's liquid form.
Sort of like when you drop mashed potatoes on the ground, it makes a splat. This destructive bomb of lava is very heavy and will hurt and kill anything in it's way. They are launched at very high speeds from the volcano, and harden as they are up in the air, then land with a huge thud, hopefully not on anyone. They come about the size of a coconut, or even larger. They are very heavy and are solid, unlike most of the pyroclastics.