Here's footage of one of the largest anacondas ever filmed. On YouTube, many shorter versions of this film are labeled as an anaconda regurgitating a cow. But others have chimed in and said it is only a goat.
Either way, the snake is massive. Towards the end, you'll see it stretch out and it dwarfs other anacondas that I've seen filmed that were over 20 feet.
Thanks, Brian P.