00:01Annual A nearly threw a punch after a fan caught him completely off-guard during a live performance.
00:07The Puerto Rican rapper was on stage when someone suddenly approached him from behind.
00:23Startled by the unexpected visitor, Annual quickly turned around and raised his fist,
00:28appearing ready to swing before realizing what was happening.
00:31The tense moment quickly caught attention online, showing just how fast an unexpected encounter can escalate when someone gets past
00:38concert security.