Friday afternoons usually come as a relief but not this one.

Within a span of minutes, the country music world learned it had lost two of its own: Troy Gentry, one-half of Kentucky duo Montgomery Gentry, died in a helicopter crash at age 50, while Hall of Famer Don Williams passed away at 78.

The industry mourned both on Twitter.

"It's a heavy day for country music," said Josh Turner, summing up what his community was feeling.

"The world changed today. Country music lost a both a friend and a hero," noted Lee Brice.

Chris Young noted the dual heartbreak in two posts.

The Grand Ole Opry mourned the loss of Gentry, who was inducted in 2009 along with Eddie Montgomery.

Jason Aldean recalled how Gentry, whom he dubbed "T-Roy," and his Montgomery Gentry bandmate Eddie Montgomery were "always extremely cool and supportive" of him when he was a new artist. "I will always have nothing but respect for those guys," he wrote. 

Travis Tritt admitted he was in "total shock and disbelief" over the loss of longtime friend Gentry. "I just saw him days ago!" he noted.

"Those Williams boys, they still mean a lot to me/ Hank & Tennessee & Don, too," wrote Roseanne Cash, updating the lyrics to Don Williams'  own Good Ole Boys Like Me.