"It was a stressful day, but it was a day," said Alameda Police Ofc. Tom Cobb.
Some days are more stressful than others, but Tuesday was one of those days for Cobb.
"I just saw her pale, and you know, she wasn't moving," said Joycie Shinzato, the daycare owner.
A 4-month-old girl at Shinzato's home daycare stopped breathing in her crib and Cobb was the first on scene.
"I actually wasn't nervous believe it or not. When I was in that situation I was more focused on trying to get the baby breathing again," said Cobb.
Shinzato tried breathing air into the baby's lungs, but it wasn't working so Cobb started CPR compressions on the baby's tiny chest. CPR training is required for police and daycare workers every two years.
"You're dealing with a baby, so it was much more different, much more stressful, panic," said Cobb.
CPR instructor Mike Degrano says a lot of people forget their training during that crucial moment.
"The emotion is very difficult to replicate in training. All of us react differently to crisis situations," said Alameda Fire Capt. Mike Degrano.
"When you're panicked, you forget everything, even your name. I didn't even remember the address when I was talking to 911," said Shinzato.
"She told me she was in a panic. She was mostly just giving the breaths and she wasn't sure if she did the chest compression right," said Cobb.
So Cobb began the chest compressions and after what seemed like the longest 20 seconds of his life, the baby gasped for air. He brought her back to life.
"Once I saw him I knew I was in a safe place it was like I was in a safe place," said Shinzato.
It also helped that Cobb used CPR to save the life of a 17-year-old a few years ago. He was calm under fire.
"2-0" said Cobb.
