People with that disease are usually pretty sickly though, right? Though my dad is super tall, hes just an inch shorter than this 'giant' and I've met someone who was 6'8 before. Everyone was shorter then, so I'm sure he towered above the crowd, but being that tall shouldn't have put a strain on his joints. The human body is capable of handling up to around 7 feet, thats when things start getting wonky. Though the tumor likely ensured he had a short life, he was probably strong and very sturdy.