Float plane taking off from pickup truck GIF

A pickup truck tows a trailer carrying a float plane, which then takes off from the trailer.

https://s3-us-west-1.amazonaws.com/h...from_truck.gif
https://s3-us-west-1.amazonaws.com/h...from_truck.gif

This was also standard procedure in Montreal's Cartieville airport.
Landing (skidding) with floats was accomplished on the grassy portion adjacent to the runway.