He knocked it out of the water

Ronny Jackson, a former White House doctor, insists that Donald Trump is very healthy. In an interview, Jackson said:

“He was in great shape. I put him on the treadmill and did a cardiac stress test on him,” Jackson said.” He knocked it out of the water. I mean, he was in the top 10% of everyone his age.”

https://www.yahoo.com/news/former-white-house-physician-ronny-035552303.html%22I

This is a mashup of “knocked it out of the park” (to do something extraordinarily well) and “blow (somebody/something) out of the water” (to defeat or ruin something or someone). It is a variation of a previous malaphor posting, “blew it out of the park”. https://malaphors.com/2012/10/27/they-blew-it-out-of-the-park/

A tip of the hat to Lou Pugliese for spotting this one and sending it in!