L555 Roll over danger

How hard is it to roll over an L555? I was painting mine the other day and I had the boom as high as it would go with no attachment on it, I then just moved it back about 5 feet and was going to turn left a bit to reposition it in the sun, as I started forward slowly the front wheels came off the ground and it hung for a few seconds like it wanted to go over backwards, I quickly dropped the boom and the wheels came back down. It scared the S... out of me. Would it have gone over backwards or would the back have stopped it?

I think the back would stop it, but if there was enough speed as it went back, it may have have gone over. This is why you need to keep the load low when operating it.
Without a bucket, or an empty bucket, the front wheels are very light on the ground, as you have noticed.