DRD Team

In Hexen the Mage's default weapon makes blood splat items from the monster to fly far away to the next wall behind the monster.

If you use a chasecam, autoaim 0, tilt a bit down and go close to the moster you can literally see the blood splat sprites flying to the wall cross huge distances.

(This seems to happen with every GZdoom version. might be a ZDoom bug?)

That weapon has a "ripping" attack - ie it passes right through the enemy and on to any other enemies behind it. All ripping projectiles throw blood out the other side of the enemy as you describe. Personally, I like the effect.