Example 1, primary weapon raised, standing:
Start running forward and strafe right or left at the same time then lower weapon. Character starts sprinting for a short time then abruptly stops and continues with normal speed
Example 2, primary weapon raised, crouched:
Start running forward then lower weapon. Character raises the weapon, then lowers it, stops and then continues to run
Example 3, sidearm weapon raised, crouched/standing:
Start running, crouched or standing, lower weapon. Character stops, performs lowering weapon animation then start running again.
Example 4: primary weapon lowered, standing:
Start walking, press fire once. Character stops, raises weapon then continues to walk.