"To be honest, I don't have the slightest idea what happened," said Foster, who has a large gash on his right hamstring. "The only thing I remember is that I did run into his lane.
"I'm positive the track had something to do with it. I wish I had time to work on the track. But everyone had to run on it. I can't sit here blaming the track, Mark or anyone else.
"Fair or not, that's the way it ended. Basically, I think I made a physical mistake. I'm sorry I didn't win the gold medal, but I was happy to see Tonie win it."
Campbell, however, was not certain until two hours after the race he would be declared the winner.
Canadian officials protested, requesting that the race be re-run.
"This is really upsetting," Campbell said. "If they want to run again, I won't run. If Foster and McKoy want to run me again, I'll step into the blocks any time. But not today. Today's my day."
The Canadians withdrew their protest when McKoy said he wouldn't take part in another race.
"In all honesty, I was running for third today," said Campbell, who had a knee operation in 1985 but returned later that year to win the World Cup in Canberra, Australia.
"I knew Foster and McKoy were the best of the field. But I should have known anything can happen. McKoy is known for hitting hurdles, and Foster's known for choking to a certain degree."
Two lanes to McKoy's left, Campbell managed to stay out of harm's way.
"When I heard the wood, I tucked in close and accelerated," Campbell said. "I didn't want to be a tourist and lose my chance to win the race."
Asked if he felt his victory was tainted, Campbell said: "Not at all. Everybody's going to say Tonie Campbell won the world championship but . . .
"That's unfair to me. How many times do I have to win championships to get respect? I've been on the Olympic team two times. I've been the American record-holder. What do I have to do to prove myself?"
Before the meet began last week, Campbell talked about the way he tells his athletes at Irvine to approach the high hurdles.
"I tell them I'm a sprinter and somebody played a dirty trick on me by putting hurdles in the way," Campbell said.
The trick Sunday was on Foster and McKoy.
"This is part of hurdling," Campbell said. "It's a graceful event, but it can be violent. You can speculate about what might have happened if Foster and McKoy hadn't fallen. But they did."