Her craft didn't explode immediately, but it did drop toward the surface.
I-58 launched all four Kaiten, of which one exploded immediately after launch.
The salmon immediately exploded from the river, sending spray flying.
When the pieces of uranium or plutonium in the bomb are brought together, they explode immediately.
They don't need to hold a block long because Smith explodes immediately through the hole instead of waiting for one to develop.
The liquid is toxic to living creatures, and causes the body to immediately explode.
The starboard-wing hit the ground first and the machine immediately exploded.
"It would immediately explode the whole social situation and violate all processes in the country."
In the event of enemy action, surely some, or all, might have been able to bale out if the plane had not immediately exploded.
Indeed, some are designed to become land mines instead of exploding immediately upon impact.