The Jurassic World star is backing the drive by the White House by appearing in a new public service announcement (PSA) to highlight the number of attacks on women at universities across America.

The comedy skit focuses on the statistic that suggests one in five female students will suffer a sex attack by the time they finish college, and changes it to what would happen if one in five were eaten by a bear.

Johnson is seen drinking with a group of buddies when a hungry bear arrives at the door, and he placates his terrified friends by insisting that only one of the five of them will be savaged by the beast.