Abstract: An indoor anti-riot catcher, the casing of which is mounted on a ceiling; two or more pressurized gas containers are mounted in said casing; wherein a shooting head with a net is mounted under one pressurized gas container; small containers containing color paint, stimulating substance, or fluorescent powder are mounted under the other pressurized gas containers; a shooting mechanism is mounted at the orifice of each pressurized gas container, and said shooting mechanism may be solenoid valve triggered type or fuse resistor triggered type and may be controlled by a central monitoring system or a CCTV monitoring system.

Abstract: A confetti projector comprises a confetti-filled tube (1) and a pressurized air cylinder (2). Said cylinder (2) has only one passage as air's inlet and outlet. When a user rotates the tube (1) relatively to the cylinder (2) to a certain position, high-pressure air flows through the passage and into the tube (1), and the confetti is suddenly projected into the air.