Gold colored globes

Approx.9 golden sphere/globes were suspended over the Winnipeg River. They were in clusters of threes. Two extinguished in an implosion fashion and what appeared to be an imprint like a transparent bubble of it's shape was left.The larger ones remained. People of all ages, approx. 50-60 residents gathered outside to observe. Most went back in as the sight was unusual but uneventful. The globes were glowing but emanated no illuminating light outside it's periphery. One touched the river surface and ascended back in it's cluster position. I did not witness their departure nor did I since find out how they left our vicinity.I assumed they also abruptly disappeared like the first two.
Date is approximate.  We have entered a date for August 1976.  PD