President Trump showed off his strength in the White House on Thursday during an event announcing a new initiative for pharmaceutical glass packaging.

During an event at the White House as part of Made in America Week, the president participated in a strength test to show the durability of a new pharmaceutical vial.

The president first exerted pressure on a lever to easily break a conventional pharmaceutical vial. But he was then instructed to "lean into it more" and put his weight into the second lever, under which was a Corning Valor vial.

That vial didn't break even though Trump shoved down on the lever hard and exerted about 1,000 pounds of pressure on it, according to Corning CEO Wendell Weeks. Moments later, Weeks said that's about as much pressure as a "punch from a professional boxer."

"People never knew that about me," Trump said to laughs in the room. "They'll find out."

The experiment was part of the president's event featuring the CEOs of Merck, Pfizer, and Corning, which makes pharmaceutical glass. The companies announced that through their new initiative, pharmaceutical glass packaging will now be made in the U.S.

The trio of companies is launching an advanced pharmaceutical glass packaging operation, with facilities in New York, New Jersey, and the southeastern U.S.

The operation will include an investment of $500 million and create 1,000 jobs.