In their first season together with the Boston Celtics, Isaiah Thomas and Al Horford have developed a strong bond on and off the court.

Thomas put that on full display after he poked fun at Horford by making his son imitate the former All-Star big man's flinching at the ball's bounce after a free throw miss.

The latest had happened during the Eastern Conference Finals against the Cleveland Cavaliers. The fact that this has occurred a few times makes it something quite out of the norm and an easy target to make fun of for Thomas. What would have made this an even more hilarious situation would have been to see Horford's reaction to his teammate's humorous take on his free-throw flinches.

That said, Horford made a big impact in his first season with the team averaging 14.0 points and 6.8 rebounds per game. He played a significant role in the Celtics earning the top playoff seed in the East while reaching the conference finals for the first time in five years.

The 31-year-old is set to enter the second season of his four-year $113 million deal and looks to remain a huge part of the team's future plans moving forward.

Meanwhile, Thomas is also coming off his best campaign averaging a career-high 28.9 points on 46.3 percent shooting from the field along with 5.9 assists that helped him earn his second All-Star Game selection and first All-NBA Second Team nod. He is set to enter the final year of his deal worth $6.3 million, which could set the table for a major decision regarding his future with the Celtics.