Cry with a flourish

• Follower of a wondrous feat
• "Amazing, right?"
• "I'm the bomb!"
• Triumphant cry
• Exclamation with a dramatic reveal
• "I did it!"
• Drumroll follower, at times
• Cry after doing something impressive
• Cry of triumph

Wiktionary Word definitions in Wiktionary
interj. (alternative spelling of ta-da English)