A couple of weeks ago I posted about this sweet laser stunt from Teravolt.org, and I finally got around to trying it for myself. My laser is only 10% as powerful as theirs, but I can now say with conviction: Everyone should try this.
The only tricky part is getting the laser and the hanging drop of water lined up and keeping them aligned, but this simple stand I built from hardware store odds-and-ends makes it easy. The laser and syringe snap into broom clips mounted on supermagnet bases which allow easy positional adjustments, but hold strongly enough to keep everything in alignment once you’ve got it right.
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