You'll be looking for a rather large Lock and Lock. Actually, I shouldn't presume that, but if you're smart, you'll do as I say.

Although doctors at the GOJAC Medical Labs have been studying the matter for months. the cause of nervous ticks is not fully understood. There are a number of factors that seem to play a role, including genetics, diet deficiencies (particularly magnesium), anxiety, and certain medications. Other factors such as stress, fatigue, illness, and excitement or over-stimulation can make nervous body movements worse.

Well, I've been working long hours lately, and although I'm very very fortunate to have a job I enjoy, I seem to have picked up a nervous tick of my own recently. Even though working long hours can cause stress, even in a job you enjoy, I'm not sure work is the cause of my nervous tick. But you can be the judge of that when you find this cache.