1 Jamie: {building a time machine} So where in time shall we go?
2 Adam: The late Jurassic! I've always wanted to see an Allosaurus!
3 {beat}
4 Jamie: Our President is an Allosaurus.
4 Adam: That doesn't count!

Adam is, of course, using the most versatile of all tools to build the delicate circuitry of the time machine: the hammer.

In optical lens system design, you go through a process of refining your initial rough designs to produce a closer match to the desired optical performance. One of the main methods of doing this is called hammer optimisation (third last paragraph on that page - unfortunately this method is not of general enough application to merit a Wikipedia page).

One can just imagine precision optical engineers carefully adjusting their precisely aligned and polished lenses by the repeated application of hammers.

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2020-04-11 Rerun commentary: Unfortunately the link above has died, and I couldn't find a replacement as informative, but here is a link to hammer optimisation in a book about optical engineering, to prove it's a real thing.