He wasn't my friend, he was a well known musician who played with Steve Cropper (the person that posted the message above on his Facebook page). Donald "Duck" Dunn, along with Cropper, were members of Booker T. and the MG's, perhaps best known for their instrumental hit "Green Onions" (though Dunn didn't actually play on that cut as he wasn't a member of the MG's yet). He had a long and impressive career that included stints in several different bands as well as being a sought after session musician. Even though I'd heard "Green Onions" many, many times and I had heard of Booker T. and the MG's it wasn't until the Blues Brothers came along that I really became aware of who Donald "Duck" Dunn was. The one and only time I ever saw him in concert was when he was a member of Neil Young's band during the Music In Head tour in 2000.