If I may chime in, this isn't necessarily normal. But, the lower leaves do have a tendency to Get all sorts of crazy on ya. This can be due to a multitude of things, from ph lockout to over feeding to bound roots/root rot. Fortunately I don't think any of these are your problem if these are the only two leaves that look like this. However, lets talk about your node spacing. It's huge! Like your plant is stretching really bad. How tall is your plant and how many nodes does it have? It looks like its stretching really bad to me. My plants nodes tend to be no more than a couple inches apart, any more than that usually points to a lack of light. What's your lighting situation?