Coldplay’s Chris Martin delivered laughs and raised eyebrows during his July 15 show in Massachusetts. After jokingly confirming if a couple with a “Just Engaged!” sign were truly engaged “to each other,” Martin playfully warned, “We don’t want any surprises.”

But surprise hit moments later when a jumbotron showed Astronomer CEO Andy Byron hugging a woman—sparking viral affair rumors. “Either they’re having an affair or they’re just really shy,” Martin joked. Astronomer has since launched a formal investigation.