Translation:Putting my hands on my head, I started to cry.
Can someone please explain the difference between "punându" and "punând", and on the previous sentence, "făcându" and "făcând". Is the first one the gerund and the second one the participle? I am very confused and there don't seem to be any explanatory notes for this section yet.
As I understand it - and I am not a native speaker, but a learner like you - a 'u' is added when a pronoun is used or when the verb is reflexive. So, 'buying them' would be 'cumparandu-le' or 'cumparandu-i' and 'reading it' would be 'citindu-l' (e.g. newspaper) or 'citind-o' (e.g. book) and 'washing themselves' would be spalandu-se' and 'imagining' would be 'imaginandu-si'. The exception, as you see, is the feminine 'o', where no 'u' is required.
See page 169 of the following for formation of gerund rules: http://www.seelrc.org:8080/grammar/pdf/compgrammar_romanian.pdf