San Francisco 49ers' head coach Kyle Shanahan reacts in 2nd quarter against Detroit Lions during NFL game at Levi's Stadium in Santa Clara, Calif. on Sunday, September 16, 2018.
San Francisco 49ers' head coach Kyle Shanahan reacts in 2nd quarter against Detroit Lions during NFL game at Levi's Stadium in Santa Clara, Calif. on Sunday, September 16, 2018.
Photo: Scott Strazzante / The Chronicle Buy photo
With just over two minutes left Sunday, after a disastrous pass from Jimmy Garoppolo landed in the hands of a Lions defender, it appeared the 49ers would squander a 17-point, fourth-quarter lead in an epic collapse.