LOL!!! It would be really funny trying to get someone's attention by screaming out to them
. I don't know of any signals, but i have heard of a "honk" but I don't quite know what it is or how it's done. Something cool that I just remembered is that once I went ot LA for the weekend, and on my flight back one of the advisors of my chapter was on the same flight to tha Bay that I was. I thought that was pretty cool.