This thing used to could happen: A person would be typing and stop for a sip of coffee and set their cup down and type to the end of the line and the carriage went ding. You would slap the return lever to start the next line and damned if I hadn't set the cup down in exactly the wrong place because POW! Coffee everywhere. Also, the handset of older dial telephones was quite heavy and you could give yourself a concussion if you answered too enthusiastically. Otherwise, I can think of no way that technology has improved human life.