MCRP 12-10B.1, page 162

Section III Movement Movement techniques within built-up areas are the first fundamental skills that Marines should master. These movement techniques should be practiced until they become habitual. To reduce exposure to enemy fire, Marines should avoid silhouetting themselves, avoid open areas, and select their next covered position before moving. 4. Crossing a Wall. Each Marine should learn the correct method of crossing a wall (Figure A-8). After reconnoitering the other side, the Marine quickly rolls over the wall, keeping a low silhouette. The speed of his/her movement and a low silhouette deny the enemy a good target. Figure A-8. Crossing a Wall 5. Observation Around Corners. The area around a corner should be observed before the Marine moves beyond it. The most common mistake the Marine makes at a corner is allowing his/ her weapon to extend beyond the corner before observing, thereby exposing his/her position. Using the short stocking technique (Paragraph 2.d.) reduces exposure. Additionally, Marines can use a technique called “popping the corner” to reduce exposure time (Figure A-9). The Marine will get into a prone position near the corner of a building or obstacle around which he/ she needs to observe. The weapon is short stocked, and the muzzle is pointed in the direction the Marine is looking. This allows the Marine to engage a target, if necessary, when he/she observes around a corner. The Marine will crawl to the corner but not expose himself/herself. He/She will raise his/her upper body onto his/her elbows. The Marine will then push his/ her body forward with his/her feet and legs without moving his/her elbows. His/Her upper body, with the weapon ready, will move forward. The final position will expose the weapon, the Marine’s helmet, and a minimal amount of the Marine’s face. The Marine’s forearms will come to rest on the deck giving him/her a low profile, the ability to observe around the corner, and the immediate capability to engage targets with his/her weapon. Military Operations on Urbanized Terrain A - 7