Dr. Ian Rossborough is no stranger to controversy. The chiropractor has been known to both miraculously help a teen walk again — as well as engage in some pretty risky practices on a baby.

In the video above, Rossborough is shown treating a 17-year-old named Muntathair Altaii in his office in Australia over the course of ten visits. Indeed, the difference in the patient from the beginning to the end of his treatment is astounding: Altaii goes from being crouched-over and in constant pain, to standing and walking upright with a smile on his face. It’s hard not to be amazed by the wonders of Rossborough, who seems to be working magic by pressing on certain sweet spots then cracking Altaii’s spine to release pressure.

In Altaii’s case, the teenager damaged his back after pulling out a tree root, ultimately suffering from severe kyphosis. The condition involves forward rounding of the back, and is most often an affliction among old women who have osteoporosis. But Altaii developed the disorder after his injury damaged nerves and disks in his back.

Altaii can now say that his sessions with Rossborough helped him live a normal life again, standing and walking like anyone else his age. But how safe and effective are chiropractors in general?

Rossborough tends to manifest both the good and the bad sides of chiropractic. He used his abilities to help someone with severe back pain over time, similar to a physical therapist; but his actions in handling a baby garnered wide criticism against an unproven and possibly dangerous practice. After cracking a baby’s back to cure it of colic in a video, Rossborough received a backlash by physicians and parents around the world, calling for him to be banned from practicing on children. Various doctors noted that there was little to no evidence that proved chiropractors could help infants or children. Clinical evidence on the efficacy of chiropractic care for infantile colic has been limited and inconclusive.

At the same time, backlash against Rossborough’s handling of the infant shouldn’t scare adults away from trying chiropractic if you have back problems. As Dr. Rronald Glick, assistant professor of psychiatry, physical medicine, and rehabilitation at the University of Pittsburgh School of Medicine, told Time: “the benefits of chiropractic for acute low back pain have been pretty widely accepted for years now within the medical community.”

It seems to all depend on whether your chiropractor is decent or not. “Like any other type of doctor, some chiropractors are good, some are just OK and some are bad,” Dr. Simon Dagenais, a chiropractor and clinical epidemiologist, told TIME. “It takes just a few rotten apples to spoil the bunch.”