Company Train

Company Train or 社畜トレイン (Shachiku Torein) Is a unique Prophecy T-Spin Double method which is mainly used on a relatively flat terrain. This form mainly uses S one column away from a wall and an L hanging on top of it in order to create a T-Spin Double which would then be immediately followed by another T-Spin Double. This setup was developed by Japanese players.

Generic Structure
As long as S has a place to be dropped with at least 2 blocks high wall on one end of S and a single gap on the other end of S before it hits wall, this technique's generic structure is always possible.

Variations, Other Uses, and Comparisons
As mentioned before, this technique is always possible as long S has a place to be dropped. Even though it's possible, doing it over a 3-wide hole is inefficient in most cases because the player is forced to make an unconventional overhang in order to achieve the second T-Spin Double.

If L has a place to be dropped on, players could drop the L first before spinning in the S later.

S and L could be substituted by other blocks. As long as it has maintains the same shape as the generic structure, it is still possible.

Compare the 4th example of the Company Train's variation above with Kaidan Setups (both L and J are just swapped)(credit to kazu).

If it's possible, making the overhang for the second T-Spin Double on the other side of the build before the T for the first T-Spin Double comes could help on executing a much faster attack.

Compare the Company Train's variation above with Cut Copy (both could be used for a quick consecutive T-Spin Doubles and the overhang for the second T-Spin Double could be prepared before executing the first T-Spin Double).

Diagonal shaped holes below Company Train could be used to make three or more consecutive Company Trains. The downside to this is that this variation requires a lot of Zs on demand and might block the Tetris hole (if there is one) located below the build for a few bags.

Company Train could be used as a direct follow-up to a T-Spin Triple.

Instead of directly doing the second T-Spin Double, repeating another Company Train is also possible and it also maintains a clean stack. In theory, this could be continued infinitely. But in practice, this requires alot of S and L on demand. This shares the same principle as Mechanical TSD v3.