It was a parody of the usual conspiracy claim that oswald could not have fired the shots and then ran down six flights of stairs, buy a coke, and then not seem out of breath by his boss and a police officer who saw him on the second floor.
I agree. In fact, I believe I saw a piece about that just last night. But I've never made any claims either way. I just posted an article about a man who was said to look enough like Oswald to supply Oswald with an alibi. If you read the "more" at the bottom of the post you'll know that story was debunked when the man in the doorway was identified.
My own opinion is the CIA was involved. There's obviously more to the story and who else could have done such a good job covering it up?