Butler- Resisting Opal's Mesmer

The heavy door bounced in fits as it was butted from the outside. Butler pushed the trolley into the room, stumbling after it, hunched and shivering.

“He is strong, this one,” said Opal, almost in admiration. “I mesmerized him, but still he refused to kill your friends. The stupid man’s heart almost burst. It was all I could do to force him to construct the barrel and fill it with fat.”
...

If Opal gets the lemur, then the entire planet will suffer, thought Artemis.

Opal snapped her fingers. “Butler, seize the animal.”

Butler took a single step toward Artemis, then stopped. Shudders racked his broad back, and his fingers were claws wringing an invisible neck.

“I said get the animal, you stupid human.”

The bodyguard dropped to his knees and pounded the floor, trying to drive the voice from his head.

“Get the lemur now!” shrieked Opal.

Butler had enough strength for three words. “Go . . . to ...hell.”

Then he clutched at his arm and collapsed.

“Oops,” said Opal. “Heart attack. I broke him.”
...

“Hold on, old friend,” murmured Artemis, trying to keep his mind focused.

He pulled the defibrillator paddles from their holsters and peeled back their disposable safety covers, leaving a thin coating of conductive gel on the contact surfaces. The paddles seemed to grow heavier as he waited for the unit to charge, and by the time the GO light flashed green, they felt like rocks in his hands.

“Clear!” he called to no one in particular, then positioned the paddles firmly on Butler’s chest and hit the shock button under his thumb, sending three hundred and sixty volts of electricity into his bodyguard’s heart.

Butler’s body arched, and the sharp smell of burning hair and skin assailed Artemis’s nostrils. Gel crisped and sparked, burning twin rings where the pads had made contact. Butler’s eyes flew open and his massive hands gripped Artemis’s shoulders.

Is he still Opal’s slave?

“Artemis,” breathed Butler, but then frowned in confusion. “Artemis? How?”

“Later, old friend,” said the Irish boy brusquely, mentally progressing to the next problem. “Just rest for now.”

-The Time Paradox, Chapter 14