An endo? hmmm thats kinda hard since all the weight is usually on the back wheel. Well there is a chance while turning with a swb to block your turning when your foot is in the wrong position, this with practice will discontinue. And if you tried to sharp a turn with a lwb you have a chance of peddling right into a no balance stance. All these things with practice will disappear. Don't worry there too fun to not try to get used to them....