A good example of this is noting if your dog shows signs of nervousness or physical sickness before eating grass. (caninejournal.com)
Watching the dog for signs of nervousness, frustration or excitement can make all the difference in preventing a bite. (mnn.com)
So, ummm, like and similar sentence gap - fillers are often signs of nervousness, used by speakers as a crutch to avoid awkward pauses. (blog.simplyhired.com)