Haines High School valedictorian Keegan Sundberg on Tuesday urged his classmates to “try your best to accept new things with an open mind. Life is full of surprises.”

Moments before, classmate Kyle Klinger provided a graduation surprise, serenading his classmates with a soulful, sometimes funky, version of “Feeling Good,” a 50-year-old show tune while dancing a circle around them at center court of Karl Ward Gym.

Klinger’s performance enlivened commencement for the class of 2015,…