Yep that's a pun.  WikiHow has an article describing in copious detail how to generate an approximate value of pi by repeatedly throwing a hot dog and counting how many times it lands in a position that crosses a line on the floor.  After a few hundred throws, the ratio of twice the number of throws to the number of times a line was crossed should be around 3.14.  $2 to the first person who can explain why this happens (my vote's on Rich).  (via Cynical-C) #food