1-Down?
Which also opens up the possibility of 1-Left and 1-Right Mushrooms.
If Mario gets a 1-Up after having a 1-Down does he get an extra life and/or turn to normal Mario? That is, would a 1-Up Mushroom cure a zombie?
The 1-Left and 1-Right Mushrooms could have a temporary effect similar to the left or right d-pad being stuck down. Taking it a step further, a 1-Left-Up Mushroom could have the effect of the left d-pad being stuck up or unpressable for a short amount of time.
Do people doing speed runs hold down the right d-pad the whole time or do they use tape, glue, solder, etc?