No one knows when it began happening, but somehow the internet has grown to be our greatest treasure house of cat images and videos. Which means cats essentially drive the world at this point. Celebrate our furry, aloof overlords at the Internet Cat Video Festival. This is the final time the curated collection of funny and strange cat videos will happen, so be sure to attend one of the three showings, which take place at 7:30 p.m. Wednesday through Friday (July 13 to 15) at Contemporary Art Museum St. Louis (3750 Washington Boulevard; www.camstl.org). If you wish to remain in good standing with your own cat companions, don't tell them where you're going — they are supremely jealous beings. Tickets are $10 to $25, and the same program will be shown all three nights.