Have costosharp pain left side top breastbone twisted body felt like something popped in middle of chest and pain disappeared since is this possible?

Pop goes the Cart... It sounds like you giving a pretty good description of pain from the area of the cartilaginous junction between the ribs and the breastbone. This type of pain can come and go for seemingly no apparent reason, although twisting movements could be a contributing factor. Although medical treatment is not generally necessary, if concerns arise, a consultation with a specialist might allay your fears.