Coldplay have been forced to halt their show twice as Chris Martin called in medical and security support. The band stopped their Wembley show on Saturday night during hit Sparks before halting it once again. Frontman Chris caught the attention of security as he pointed into the crowd while pausing the rest of the band during their encore. Medics and security were seen entering the standing section of Wembley Stadium as a concerned Chris looked on. The crowd started the cheer as they rushed