He knew they were working when his arm started to tingle.

True, his arms were starting to register the strain, but he was making good progress.

As the night wore on, my arm and hand started to hurt quite badly.

Her arms were starting to hurt from holding on to the cable for so long.

Her right arm started forward to wave him away but she stopped it in time.

He took my arm very firmly, started to lead me away and then said, "Hi."

His arms and legs would start moving on their own.

The arms start to form and tube feet begin to appear.

His arm started to ache and then tire out but he did not stop.

Three arms started to back off and couldn't move.