Watch John Oliver Explain Why He Tased Himself for the Troops

Last Week Tonight host John Oliver appeared on the Late Show with David Letterman and discussed how far he’d go to make people laugh — including injure himself.

The 37-year-old comedian told Letterman that during a USO Tour to Afghanistan in August, 2013, Oliver had just finished performing a set for the troops when a soldier asked if he’d tase himself. Oliver, looking for a laugh, agreed.

The visit marked the first USO tour for Oliver, who was touched by the trip as his wife is a former Army combat medic, who deployed to Iraq.

The next season of Last Week Tonight is slated to return to HBO on Feb. 8.