the boot is on the other foot BrE
the shoe is on the other foot AmE

In Britain, the boot is on the other foot.

The boot is on the other foot and the prisoner shrieking his plea as you heat it.

'So now,' he said, looking into her eyes, 'the boot is on the other foot.'

"The boot is on the other foot now" means that a situation has become reversed-a previous victor is now losing, for example.

The boot is on the other foot, and the stress of personal problems now impedes Anatoly's ability to play chess, so that Freddie starts winning games until they are tied 5-5.

For an example of another great 'tackle from behind' this time where the boot is on the other foot but rightfully no freekick was given check out his Toure compilation and the tackle at 2:11.

Now that the boot is on the other foot and those idiots in the Group of Four have managed to drive Cayleb into outright public defiance, he's feeling just a tad exposed here in our welcoming bosom."

Herr Merkel insists that other countries change their constitutions so the one glove fits all policy works, now the boot is on the other foot she needs to do something about it & not be too slow about doing it.