How to Use Hand Signals in a Busy Pub or Restaurant

I tried to come up with new hand signals for things that there are no hand signals for. You cross your fingers whenever they're like, you've got your legs crossed, trying to hold it in. That'll do as a symbol. I am saying you can use it in many different ways. There's a lot of situations where letting people know you need the loo without having to say, I need the l toilet. Would be kind of handy.