We've all heard of DDoS (distributed denial of service) attacks bringing down web servers, but we bet most people can't really imagine what a DDoS attack looks like.
Logstalgia visualizes web-server access logs as a pong-like game. As the app's official site says, it's a "battle between the web server and a never ending torrent of requests."
VideoLAN developer Ludovic Fauvet turned a recent DDoS attack on VideoLAN's server into a Logstalgia video that shows an amazing, one-sided fight between thousands of requests, with the web server desperately trying to keep them all at bay.
This is exactly what happens during a DDoS attack: many computers (sometimes an entire botnet) send a lot of requests to a single web server, rendering it very slow or even completely unavailable.
To check what a "normal" Logstalgia visualization looks like, check the video below.