I would also guess those same lasers could be used to analyze a persons breath from afar and distinguish different gas compositions, tone and frequency of breathing from different people distinguishing them.

I wonder how well UHMWPE[1] armor plates would work as well.

[1]: https://en.wikipedia.org/wiki/Ultra-high-molecular-weight_po...

This is a new one. A lot of people have had an EKG, the database is already seeded.