The hiring people may just want/need to know how you spent your “void” time for legal, security or safety reasons. They also need to understand if you can still

The hiring people may just want/need to know how you spent your “void” time for legal, security or safety reasons. They also need to understand if you can still function within a working environment: the dynamics, the pressure, etc. After that, you can tell them anything, provided that it can stand a possible background check.