stand back for plenty of arguments from people saying 'this isn't a proper spin' - just ignore them!
To know if it is a spin or not look at the ASI once you are in - if the speed is low and oscillating it is a spin, if it is increasing then it is a spiral dive, in my experience a C150/152 nearly always ends up in the later, the autorotative bit at the beginning is the
incipient spin, not the spin itself.
