I have to write in on this one as I have had (sorry to say), similar experiences and have related them at the assemblies. At the time my husband and I were pioneering on a bare subsistance wage cleaning at all hours of the night. We often had little food and had an experience similar to the australian one. We were walking home from work in the night and came across a ditch were a bread lorry had lost its load out of the back.
We collected as many wrapped loaves as we could and were very grateful for the bread from heaven as we called it. It was not stealing as no company would use packages that had been on the earth.
We had many other experiences that at the time we gave God the glory for. Our tiny old caravan fridge broke down and we had no money for another one, one service the next day at a return visit we see a fridge in our visits hallway, we ask him if he has just got a new one, he says yes but he wants to get rid of the old one that is working well. We of course were overjoyed and yes we gave thanks to Jehovah. Actually our visit was a very kind man and as we have found out since leaving Jws there are lots and lots of people that do very kind things when you are in need.
I view the way in which we were used by the society in giving our experiences as assemblies, much the same as the revivalist churches in the last century. They needed testamonies of God's power, healing etc to give them credibility, the society does the same with our experiences. "See God is blessing you in pioneering, see what wonderful things happen when you serve God", I truly believed this and it was one of the points that held me in longer than I wanted because we really did have unusual experiences. I now see they were not so unusual at all, since I have left I have had just as many "strange" coincidences that have brought good things into my life to help others.
I work for the Red Cross with women who are beaten, whenever I have had to find furniture for them when they move to a new place; I can be sure that I will find just what I need within days, either through Facebook, at work in the rubbish containers (bookcases, chairs etc) or through kind friends that just want to help. So now when I meet the Jws I tell them how kind people are generally and how much I am inspired by their kindness. My dear friend told me that good things tend to happen to people who put themselves out for others, maybe that sounds a cliche but I think there is truth in that saying.
So yes I did take part in the boasting for God sessions, but now I am boasting for humanity, people are great!