I was digging around in my archives and ran across these shots that I took in 2014 with my Rebel T4i and the EF 100mm f/2.8 L IS USM lens. I haven't tried anything like this since, but it would be fun so I might give it another another go when I get motivated.
I basically adjusted my faucet to a small steady stream and set the camera on the edge of the kitchen sink.
All are SS 1/60th, f/4, ISO 1600 using the flash on the T4i.
Yet again, great images and done with great skill!