Leap to (one's) feet idiom
If you leap to your feet, you swiftly or suddenly stand up or leap up.
The soldiers immediately leaped to their feet as soon as they caught sight of the commander.
They were leaping to their feet when I went downstairs. Something fishy must have happened.
She never stands up when someone enters the room. But for John, she makes an exception, leaping to her feet whenever she sees him.
To stand up straight because one wants to show their anger, prestige or determination
1. Stand as straight as one can
2. Stand up straight in order to show anger
To stand up.
Used to say that someone stands upright, especially while giving a speech
To stand up quickly
People are always inclined to flatter or please a rich man by laughing at his joke which may not be a very good one.
Everyone at the table always flatter the boss by praising his humor. A rich man's jokes are always funny.