Tony Robbins Tells Fans to Walk on Hot Coals ... Over 30 Get Burned

A Tony Robbins' motivational seminar went haywire in Dallas when more than 30 people who walked on hot coals had to get treated for burns.

According to reports ... 5 people were hospitalized Thursday night, while the rest were treated on-site for burns to their feet and lower legs. Tony had encouraged attendees to walk the coals in order to conquer their fears. It's a common thing at Robbins' events.

Tony's people tell TMZ ... 7,000 guests walked across the coals and only five "requested any examination beyond what was readily available on site."

At least one attendee blamed the burns on a lack of focus -- some people were reportedly taking selfies. This also happened at a 2012 event in San Jose.