Shell Player hides in his Shell automatically!!

[fnafan8888888888]

I've noticed that in NSMB when the player gets a Shell Power-Up, he could run without hiding in his shell automatically, he only hides in the shell when pressing "down" key:

Spoiler

However in smbx 1.4.5 the player hides automatically in his shell when running,I reported this because sometimes there are places in levels where the player need to go fast but not as fast as a shell.