The thing must have jumped into his mind in a moment.
Five jumped into the campaign for the right to take him on.
I jump into the car, and drive them to hospital.
But to make enough room to open the door, one of them would have to jump into the water.
I had to jump into the air and come down with both feet.
The idea was to jump right back into the water.
They jump into their car and try to drive away from the truth.
"he jumped into the play at the right time and did a good job."
Let him jump into the water if he wanted to!
Just in time to jump into the fight with both feet.