It's a scream recorded for a project, most convincing part of that project, thusly been using this scream in other projects as my very own wilhelm scream.
Blood gushing fall to concrete floor; created by pouring a water/corn syrup mixture onto my foley artist's arm over a concrete drain. Towards the end you can hear my foley artist start laughing because the mixture was splashing everywhere lol. . . Still a great clip and we used it in a horror slasher film to simulate blood gush from a stabbing.