could be a minor strain or pull. it could also be a partial tear or even scar tissue breaking lose. no real way to know what's going on without an mri. if their is no bruising holes dents or lumps, then it most likely isnt a full tear. now the one down side is that when tendons pop, they dont bruise. so if you did pop a tendon again you wont know unless you get it checked out. now the big indicator on a tear is the sound. you and every one around you can and will hear it, it is very very loud