Wide receiver Kyle Williams of the San Francisco 49ers made two costly mistakes in Sunday’s NFC Championship game that likely cost his team a spot in Super Bowl XLVI.

But the real drama happened after the game, on Twitter.

Outraged fans used the social network to post a cavalcade of hateful, vile messages — including death threats — to Williams’s account.

Williams let a punt bounce off of his knee in the fourth quarter of the game, then fumbled another punt in overtime. The first blunder led to a New York Giants touchdown, which put them in the lead; Williams’ overtime fumble deep in 49er territory facilitated a game-winning field goal for the Giants.

After the game, Williams’s Twitter mentions were a list of posts denigrating his value as a person and player. Fans wished for him to “burn in hell” and kill himself. The worst came from user @javpasquel, who posted this on Sunday night:

“@KyleWilliams_10. I hope you, youre wife, kids and family die, you deserve it”

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