LOOK: Obamas' 'Holiday' Card Doesn't Mention Christmas for 8th Year

MUST-SEE: Cavuto Faces Off with Pelosi's Daughter as Electors Demand Russia Briefing

Christmas Spirit! Customer's Photo of Injured Chick-fil-A Worker Goes Viral

Actor Alan Thicke died Tuesday from an apparent heart attack after collapsing while playing hockey.

The "Growing Pains" star was 69 years old.

Wednesday on "Happening Now," Jenna Lee interviewed an employee of the Burbank, Calif., ice rink where Thicke played hockey for more than 20 years.

Darin Mathewson, the vice president of Pickwick Gardens, said he was sitting in his office when a group of hockey players told him a fellow player was down. He called 911, and EMTs responded within minutes.

"He was conscious. He was talking," Mathewson said. "I didn't see who it was at that point though because there were so many guys around him."

When the EMTs lifted the player up, Mathewson realized it was Thicke. Mathewson said Thicke was cognizant of what was happening but said he was having chest pains and was numb.

Mathewson said Thicke gave a thumbs up while on a gurney and told his 19-year-old son, Carter, to take a photo of him with the rink in the background.

"That was him...always making light of the situation no matter what the situation," Mathewson said.

Later in the day, Mathewson found out Thicke had died and said he was shocked to hear the news.

"Alan loved hockey," he said. "He was such a great guy here."

Watch the full segment above.

Thicke's former "Growing Pains" co-stars, his family members and fans took to social media to express their sorrow.

Meantime, so many are sharing the iconic 1980s "Growing Pains" theme song, "As Long As We Got Each Other."

IBM Announces Plan to Add 25,000 Jobs in U.S.

Oops! Stein's Recount Turns Up More Votes Than Voters in Detroit

Message to Trump? LeBron Sports a Safety Pin in SI Cover Photo