Barricade (Flex-5) Barricade is a fun, high energy piece that gives beginning students the opportunity to demonstrate their abilities as performers and to learn the elements of performing ensemble music. The style marking âWith Aggressionâ identifies that the piece is to be played with assertiveness throughout. Students will love the energy and excitement this piece has to offer. Driving rhythms, colorful percussion writing and melody in all voices (including the lowest ones!) will give everyone something fun and interesting to do.