These Water Flame is an very very cool optical illusion. Im not sure if they are actual photo shops or an extremely fast shutter speed.
I have recently seen a tutorial on how to create this effect in photoshop so there is a good chance thats how they are created. On the other hand it could be good timing an super fast shutter speeds! Regardless its a super cool effect!
Lighter Water Flame
Zippo Lighter Water Flame
Candle Water Flame
Match Water Flame
Candle Water Flame
Candle Water Flame
I love these pictures, Who ever made those liquid fame pics did an awesome job.