Jessica Rinaldi / Reuters

Boston Bruins Dennis Seidenberg observes a moment of silence for the victims of the Boston Marathon bombings before the start of an NHL hockey game against the Buffalo Sabres at TD Garden in Boston, Mass., on April 17, 2013. This is the first sporting event to be held in Boston after the explosions that killed three and injured more than one hundred at the Boston Marathon.

Jim Rogash / Getty Images

A Bruin fans shows her support for the efforts of the Boston police and firefighters before a game Wednesday night.

Just two days after the tragic bombing of the Boston Marathon, hockey fans gathered at the city’s TD Garden to cheer for their team.

Attendees accepted and dealt with heightened security as they entered the building and made way to their seats, and the crowd cheered as the color guard brought the flag onto the ice.

Then, thousands of voices joined together for one of the most powerful renditions of the national anthem you’ll ever hear. Play this NBC Sports video to see it happen.

Elise Amendola / AP

A fan wearing a United States flag raises his arms to be checked on the way into TD Garden prior to the game.

More than 100 people were injured and dozens arrested when rioters swept through downtown Vancouver after the Vancouver Canucks lost to the Boston Bruins in Game 7 of the Stanley Cup final on June 15.

Ryan Whitehead and his colleague Eamon Sallam from northstudio360 were in the crowd to capture 360-degree video. In late May, they had captured a celebratory crowd during the western conference finals against the San Jose Sharks, so they wanted to capitalize on that viral success during the Stanley Cup finals. But it was a very different experience. “We got some stuff when Vancouver was in a good mood. Then things got really weird,” Whitehead said. 

Courtesy of Ryan Whitehead / northStudio360

Cameraman Eamon Sallam navigates the rioting crowd in Vancouver, B.C., with a 360 video camera, after the Canucks lost the Stanley Cup Finals to the Boston Bruins.

Whitehead won’t give many details about the camera setup in the 360 rig. But there are five video cameras, each recording a different angle. Having done 360 video for couple years, they are constantly changing and experimenting with the device. To steady the camera, they are using a monopod with weights at the bottom. They have five FireWire cables hooked to a laptop in a backpack, recording the video streams simultaneously. Back in the office, they stitch the streams together to create the interactive, 360 experience.

To navigate through the crowd, Whitehead and Sallam kept the camera low and walked into the center of the scene, then elevated the rig to capture video for a few minutes. When they started getting looks from the crowd around them, they’d move on. Whitehead said people were “kind of like moths to a fire. Everyone wants to come up and talk.” Whitehead helped cameraman Sallam by keeping the crowd at bay. “I was pretty much like a bouncer for a bar,” Whitehead said. Explore the video they captured, below.

The mob mentality turned dark for the duo when a few people started saying the two were with a Boston news crew, and aggressively asking if they were sharing the video with the cops. Suddenly, 10 to 20 people were staring at them, Whitehead said. The northstudio360 team left the scene quickly.

Whitehead is getting attention for the video from media organizations around North America. It’s free advertising for his company, which typically does work in much quieter scenarios, such as aerial tours for real estate firms, or virtual tours for venues.

See more Photoblogs from the Stanley Cup and riots:

'Why destroy your own city?' Rioters run wild in Vancouver after Stanley Cup loss

Scenes from Game 7 of the NHL hockey Stanley Cup Finals

Amorous protestors, lost in the heat of Vancouver riots