Think it's only natural to celebrate scoring a goal, especially if its a cracker. Not like Johnson owes NUFC anything or needs to show respect by not celebrating, that's generally only ever done by club legends.
Plus, nowhere near as bad as Fenton and Shearer on that night though, and yet the latter is considered amongst the greatest of our club legends.
Have to say, I find this whole "oh, no, best not celebrate this one, as I used to play for them" thing to be a load of old s***.
Completely agree with this.