While drummer Tim Alexander recuperates from open heart surgery, Tool’s Danny Carey is filling in for him behind the kit during Primus’ tour. Last night at Chicago’s Concord Music Hall, Carey (decked out in a custom made Kansas University basketball jersey) made his Primus debut and the band celebrated the occasion by dropping into a cover of “Ænema.”

As previously reported, Les Claypool said in an interview that Carey will fill in for Alexander during their Riot Fest slot as well as the aforementioned Concord Music Hall gig and will do so until Alexander is ready to get back on the road.