Found a small Ding (what i call it) in my 12'6. The glass isnt cracked at all so cant of been a hard knock, search the internet and now am wondering...

how much damage before a bump is a ding and and ding is a depression, a depression is a crease, and so on

When it's your own fault, it's a slight depression. When it's someone else's fault, it's a ding.

Once the glass is cracked its a ding until then its fine