Just checked on my eldest, and he looks like he's about to fall off the bed! I moved him to the middle of the bed and stuck a pillow to the side just in case... because the bed has no railing (the other side of his bed is the wall though).

He fell one night, and made a loud thump! Since then, I've been more careful - but no railing yet.

Does your LO's bed have a bed rail?