This roll-glitch is actually very handy... you can save probably ~1:50-2:00 minutes by doing the roll-glitch twice at the start of the level, skipping getting the long way to the button and lowering the boat, haha.
It is not so easy though as you might jump through the window and fall into the water. Also after the first roll if you are at the wrong position you might bump to the wall when doing the second roll and fall in the water too...
![](https://i.ytimg.com/vi/5zEDdrClis0/mqdefault.jpg)