Toon Zone reports that Boomerang will air a 72-hour weekend marathon of Scooby’s All-Star Laff-a-Lympics, running from Friday, August 13, through Sunday, August 15. Beginning on Friday morning at 8:00am and concluding at 8:00am on Sunday morning, the marathon for this two-hour animated series, which originally aired from 1977-1980 and featured an all-star cast of Hanna-Barbera characters competing in slapstick, athletic games, will pay tribute to the Athens 2004 Olympic Summer Games.