  The proton form factor, two-photon annihilations into $p\bar{p}$ as well as
exclusive charmonium decays are critically examined. It will be argued that the
standard perturbative QCD analysis of these reactions fails, i.e. the need for
additional contributions can convincingly be demonstrated. Possible dynamical
mechanisms such as colour-octet admixtures to the charmonium states or diquarks
inside baryons, will be discussed and compared to the data.
