Stop horsing around you lot, this is serious. Was it a steak and ale pie? Or one of those new steak and red rum ones?
On a serious note, I found a long black hair in some Heinz soup not long back. Binned the soup and called their customer care line. They said send back the packaging and product so they could inspect it. Explained that I hadn't kept the soup and they said just send the can.
Two weeks later I got a letter saying they'd run the soup through a fine sieve and found no hair. Needless to say I was less than impressed, I hadn't sent them any soup! A second phonecall to customer care sorted me out with a £10 voucher to spend in any retailer on anything as long as part of it was a Heinz product. Free beer and beans!
I imagine glass is probably worth more than hair in the scale of complaint freebies.