When taking a step, you should be able to retract the lead foot and place it somewhere else without losing your balance. This requires practice, because most people throw themselves into each step and will fall over if the step doesn't go as planned. Should the advancing foot land on a slippery surface, you'll probably fall. Catch your foot on a snag, and over you go. The way you load yourself with your backpack, gear and rifle slung over your shoulder affects your balance, so try to spread the weight evenly across your frame and secure it so it doesn't shift.