If I place a boat on strings, torches, rails, farmland with not fully grown crops and other things. (take a look in the testing world) I can´t move the boat when i sit in it.

Farmland is the weirdest of them, with not fully grown crops i can´t move a boat but with fully grown crops of any type the boat has infinitely momentum until the boat land on a other block.

The player has to push the boat to do the "infinitely momentum" trick. Also works with other players or mobs in the boats.

tested on win 10 and android