VIDEO: 76ers Clearly Troll the Celtics by Having Al Horford Ring the Bell Before Season Opener

After spending three seasons as a member of the Boston Celtics, Al Horford decided to leave Beantown for the City of Brotherly Love when he signed with the 76ers during NBA free agency. Now, he's ringing the bell before the Sixers' opening night matchup against his former team.

Horford looks locked in as he emphatically smashed the mallet into the side of the Bell at center court.

Celtics' fans can't be happy about this. This is certainly an attempt by Philly to twist the knife in Boston's wounds.

What's NBA opening night without some pettiness? This is sure to only make the 76ers-Celtics rivalry even more heated, so it's safe to say this is the best start to the season fans could've imagined.