"Explosive confrontation" refers to a situation where there is a highly intense and dramatic conflict or disagreement. It implies that the confrontation is fierce, heated, or potentially volatile, like an explosion. Full definition
The investigation is expected to set up a potentially explosive confrontation between a bipartisan group of lawmakers and Timothy D. Cook, Apple's chief executive, at a public hearing on Tuesday. (nytimes.com)
As she walks home after school, feeling lonely, a white boy bullies her, his mouth snarling, the emotionally explosive confrontation surrounded by an angry sea of red. (bookpage.com)
Unite has denied breaking any rules and has warned Miliband to step back from the brink of what is set to be an explosive confrontation. (politics.co.uk)