If you ever are in a situation where you are in proximity to a tank when it is firing its main gun (emphasis added):
The primary role of the tank cannon during urban combat is to provide heavy direct-fire against buildings and strongpoints that are identified as targets by the infantry. Only large earth berms and heavy mass construction buildings can provide protection against tank fire. The preferred main gun rounds in the urban environment are MPAT (ground mode) and MPAT-OR, which perform much better than sabot rounds against bunkers and buildings.
When the M256 fires, it creates a large fireball and smoke cloud. In the confines of a built-up area, dirt and masonry dust are also picked up and added to the cloud and the target is further obscured by the smoke and dust of the explosion. Depending on the conditions, this obscuration could last as long as 2 or 3 minutes.
The overpressure from the 120mm cannon can kill a dismounted infantryman within a 90° arc extending from the muzzle of the gun tube out to 200 meters. The overpressure can also cause glass in surrounding buildings to shatter.
Sabot petals, including those on APFSDS, MPAT, and MPAT-OR rounds, endanger accompanying infantry elements. From 200 to 1,000 meters along the line of fire, on a frontage of about 400 meters, dismounted infantry must be aware of the danger from discarding sabot petals, which can kill or seriously injure personnel.