Getting out of bed

Today Jill and I were reading in our room during Evan's nap and much to our collective surprise we heard a voice getting closer and closer to our room. Eventually Evan popped his head in around the door. What does it all mean? Evan can now get out of his crib like a little monkey. This being the case we're putting the railing down now so he has an easier and safer trip down to the floor. This sure should be an interesting development.