But maybe we can learn what makes him tick in other ways.

Without another mind ticking away in the room, I was able to think more clearly.

He felt a huge clock was ticking in his head.

So still it was, he might hear the clock ticking in the hall below.

She could hear the clock ticking in the living room.

Her heart ticked away in the silence before he finally spoke again.

You can almost hear the clock ticking in Davis's head.

The whole time a clock ticked in the back of her mind.

Chris could almost hear the clock ticking in his head.

And you need to tick certain boxes in that short period of time.