Former President Joe Biden briefly stole the spotlight from his wife, former first lady Jill Biden, during a stop on her book tour this week, using an awkward audience interaction to plug his own forthcoming book.

Jill Biden was wrapping up an interview about her newly released memoir, A View from the East Wing, with moderator Whoopi Goldberg in New York City when Biden unexpectedly left his seat in the audience and walked to the edge of the stage.