Video shows a California music teacher punching a student Video

Now Playing: The 2018 NYC Marathon is underway

Now Playing: Video shows a California music teacher punching a student

Now Playing: The Spice Girls are expected to announce a new UK tour

Now Playing: Ariana Grande released a new song titled “Thank U, Next”

Now Playing: A teenage boy in Florida is being accused of killing his mother

Now Playing: Man who stopped a gunman in a yoga studio hailed as a hero

Now Playing: Key House and Senate races to watch

Now Playing: Trump rallies in red states, where his approval ratings are high

Now Playing: Why it Matters: Here’s what’s inspiring these Americans to vote

Now Playing: Tom Hanks says get those hankies out for ‘Toy Story 4’

Now Playing: Video shows parents and students fighting at Georgia middle school

Now Playing: FDA approved new opioid drug called Dsuvia

Now Playing: Indonesia plane crashed in more than a 100 feet of water

Now Playing: At least 3 dead as a gunman opens fire at a Tallahassee Yoga studio

Now Playing: More than 30 million Americans have cast early votes

Now Playing: How close is the migrant caravan to the US border and who is really in it?

Now Playing: Trump and Obama make final push before midterm elections

Now Playing: Severe weather slams the Northeast

Now Playing: ‘People’s Sexiest Chef Alive’ is heating up Times Square!

Now Playing: Michelle Williams jokes she’s ‘a little behind’ with ‘Destiny’s Child’ pregnancy pact