Every day somewhere in the world icebergs are collapsing or calving. It’s not something weird at all, it’s something natural. However the global warming will increase these activities as the glaciers are melting.
Many of these activities can be quite dangerous when icebergs are collapsing and calving, since it’s highly unpredictable and great forces are released into the nature.
Here are a few videos on what’s happening during these activities.