Not all entrepreneurs and venture capitalists are thrilled with the idea of taking a meeting with President Trump. Take former Twitter CEO Dick Costolo, for example, who likens the experience to getting drunk and “waterboard[ing] yourself.”

When word got around that the White House was pulling together a meeting with Silicon Valley technology leaders to discuss emerging trends including commercial drones, the Internet of Things and the funding of those companies, Costolo took to Twitter to shed some light on such a gathering.

“If you don’t get invited to this meeting and want to know what it was like, just drink a bottle of gin and then waterboard yourself,” Costolo wrote.

If you don't get invited to this meeting and want to know what it was like, just drink a bottle of gin and then waterboard yourself. https://t.co/secLdw2Xjp — dick costolo (@dickc) June 10, 2017

Also Read: Trump Sends CNN to 'Siberia' Press Section of Rose Garden: 'We Were Put In Time Out'

In December, the then president-elect met with a few tech industry leaders — including Elon Musk (Tesla), Sheryl Sandberg (Facebook) and Eric Schmidt and Larry Page (Alphabet) — to relieve worry they may have had about his incoming administration’s position on H1-B visas. Axios AM has reported that the POTUS has again reached out to Silicon Valley in hopes of creating better digital services for the federal government.

But Costolo shouldn’t worry too much about getting an invitation this time around, considering how freely he voices his opinion of the new president (and his offspring). Take a look:

Trump is such a wimp. He cowers from any fight, points fingers in a loss but takes credit for any win A coward, a loser, a two-bit punk https://t.co/udA7aUBTrI — dick costolo (@dickc) March 26, 2017

What a small-minded troll we elected; "a weak person's idea of a strong person" https://t.co/45DCcjD2Gv — dick costolo (@dickc) June 5, 2017

You can tell by the photo this guy is one of the biggest losers you could ever have the misfortune to meet. Just look at this idiot. https://t.co/T8c0BlgbOY — dick costolo (@dickc) April 15, 2017

Real news, fake human beings. https://t.co/yBfpd7Dw7e — dick costolo (@dickc) June 6, 2017