A woman who witnessed the tram fly by estimated it was going around 30 miles per hour - that's double the speed limit for the trams.
"We just began hearing - to me, it was metal and rumbling, and it was just a very loud racket," Lisa Lehnhardt said. "It was like a thump and a thump and a thump. But it was this rattling sound, and as it was occurring, people were screaming."
Sabino Canyon Tours owner Dan Ricketts has suspended the shuttle driver and is currently investigating the incident to see if there were any mechanical problems that could have caused the accident. He also noted this is the first time in 30 years someone was injured on the tram.
"The shuttle was going a touch too fast and it put her out that way," Ricketts said in a phone interview.
Morey and Lehnhardt explained they were very disappointed with how the company handled it, and believe new safety measures need to be put in place.
"It was amazing that as little people got hurt," Morey said. "And I think it's a gift to say it needs to be taken into consideration what safety measures need to be taken."
