On Sunday afternoon, while walking a few steps, Nicholas had a fall and hit his chin on the toy basket. It resulted in a bit of blood and a whole lot of screaming. It also made him a little timid of the walking experience. He has gone back to preferring to hold onto something. Although he's not really using it. Just makes him feel safer.
I expect he'll get over the fear soon and will be walking without holding on again soon. I'll post video as soon as I can!