Singer and 'Sketchbook' host Yoo Hee Yeol was given an 'instruction manual' on himself when he guested on the latest episode of KBS's '1 Night 2 Days'.

Appearing on the latest episode with fellow guests Yoon Jong Shin and Yoon Sang, he introduced himself as the "man hosting the very high-class music program 'Yoo Hee Yeol's Sketchbook'."

The '1 Night 2 Days' producer then announced, "The staff of 'Sketchbook' has prepared a special present for you", handing him a nondescript box.

Among the various knick-knacks in the box was included an 'instruction manual' for Yoo Hee Yeol himself. The 'manual' explained, "Characteristic: weak. Can explode at the slightest touch due to gastroenteritis. If left to sleep outside or dunked in water, possible outcome of death".

The staff members and '1 Night 2 Days' cast shared a hearty laugh over the ribbing, poking fun at Yoo Hee Yeol and his frail body.