There's been a great video going around the internet for a few weeks now on disc golf sign language produced by the Deaf Disc Golf Association. This is a great way to communicate with deaf and NON-deaf disc golfers. Those that hear know how annoying it can be when someone is talking while you're throwing or otherwise trying to concentrate. If you learn a few of the signs, you can avoid being THAT guy. Most of these signs work well when trying to communicate with someone on another fairway, it's certainly better than yelling at the top of your lungs to ask your buddy a question.