Martin joked that he needed to “do some basic security checks” when a fan tried to propose at his show in London.

Coldplay helped a fan with a proposal during their concert at London’s Wembley Stadium on Aug. 22, but frontman Chris Martin had a few questions first. A video shows Martin joking around with the fan before honoring his request.

When a fan in the crowd held up a sign asking for help in proposing to his girlfriend, Martin first carried out what he called “basic security checks” before letting the moment unfold.