While we certainly don't recommend this, it does make for an interesting video. Lee Hilbert and Scott Ross found themselves with a Cessna 120 (O-290) on Edo floats miles from the nearest lake, and rather than tow it to the water, they came up with an interesting solution to get the Cessna airborne:
This is a companion discussion topic for the original entry at https://www.avweb.com/multimedia/votw/video-of-the-week-float-plane-takeoff-from-a-moving-trailer