Tottenham's young goalkeeper felt the full force of Alan Shearer's reproach after his mistake saw Aston Villa go 1-0 up in the first minute.
Villa got off to a lightning-fast start in the fourth round FA Cup tie when Jacob Ramsey blasted an effort goalwards from around 15 yards away.
His shot was straight at Kinsky but the ball managed to bounce through the goalkeeper's hands after 57 seconds.
Shearer did not let the 21-year-old off the hook on BBC co-commentary, branding it a 'howler' and claiming he 'had to do better'.