alāta-cakrera - the circle of a firebrand; prāya - like; laguḍa phirāya - wheels the rod; dekhi' - seeing; sarva-loka - all the people; citte - within the heart; camatkāra pāya - became very much astonished.

When Śrī Caitanya Mahāprabhu whirled the rod in a circle like a firebrand, the heart of everyone who saw it was astonished.