Eyvindr grinned. Too easy. He knew there was no catch because he was reading the thug's mind. As soon as the thug came to the stairs, he would find needles flying from Eyvindr's pouch into his limbs, then making a circle during the inevitable fall and entering the limbs again once he was on the ground, entering the wood floor with ease (If the floor is made of some other material, ignore the whole little 'pin down'). Eyvindr's borrowed gun would then point itself at the thug's face. His earlier thought process was most likely true: the thug probably knew most of what Eyvindr needed to know.
"Any noise you make will be your last. Now, I am going to ask you some questions. You will think the answers. If you cooperate, I might let you live. If you lie, I will know, and I do not consider lies cooperation. Have I made myself clear?"
Without waiting for a response to his question, Eyvindr continued with his method of speech.
"First of all, where are Mr. and Mrs. Durbeyfeld and the Ring of Siren?"