[GTALUG] How do I demonstrate a crappy network?

I'm working on an article about advances in Linux networking (eg, Cake), but with a demonstration anyone can do, to convince doubters. I therefor need a way to show how crappy someone's network is. I tried Skype "echo" calls and an couple of similar approaches, then tried playing you-tube videos, all while throwing a load on the network. But it doesn't /visibly/ fail. What is something that I can make fail, either audibly or visually? Showing my grandmother ping statistics isn't going to work (;-)) --dave -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb@spamcop.net | -- Mark Twain