0 carelessly fast and dangerous:
1 dangerously fast:
You can see that things in this field are developing at breakneck speed.
It had a breakneck timescale within which to reach its conclusions.
It has been moved in an unavoidably complex and dense way, and also at breakneck speed, which makes it somewhat difficult for us.
Dairy farmers are going out of business in this country at breakneck speed.
It spilled over into a new breakneck consumer boom, and it has had two effects.
Previous strategies to harmonise technical regulations have not been able to keep up with the breakneck pace of developments in the air transport sector.
We are working at breakneck pace, month in month out.
In urban areas, the urban reinvention programme—in truth, the urban post office closure programme—is occurring at breakneck speed.