A joyride glider slammed into a residential building just after taking off in Jharkhand's Dhanbad district, injuring the pilot and a 14-year-old passenger. Both have been hospitalised in a serious condition, officials said. The glider took off from Barwadda airstrip in Dhanbad and crashed into the house some 500 metres. Officials said a technical snag may have led to the incident, but the reason would be known only after a proper investigation.