when you put too many TNT minecart THEY go boom boom weirdly

When you put too many TNT minecarts on one rail, break it and push it, they go in the direction you pushed them until they either crash into a wall or fall and then explode. And they explode weirdly (at least for me). They go boom boom in a vertical line and TNT minecarts also spin vertically and SO FAST due to a weird game mechanic I think.

Note: I don't know if it's a bug

Note: The video needed to be 10 megabytes so it's 3 seconds hope you understand it