Not early 70's, but the first thing that popped into my mind was the scene in Stephen King's IT where all the principal characters are seated around a table in a Chinese restaurant. Each opens their fortune cookie and something horrible pops out of them (blood, an eyeball, a crab-like creature, etc...).

BTW ~ This thread was started in 2007 and the guy who started it hasn't been see on the CHFB since 2008!