1962 Hanging 2 Penny With Lump?

No, not common.

This is an old subject, but it helps me to understand my coin. And it should answer the pending question. It's never too late.

I have a coin like this one. The original post doesn't show the obverse, but I'm quite sure we could find a lump similar to my coin, just under the Queen's chin.

I was never sure if the lump is a bubble or produced by clashed dies with foreign object, although this last one was my preferred explanation.

The lump shape looks like a gas bubble, but in this coin the observer/reverse lumps are perfectly aligned and with the same shape.

So, now I know it exists at least a second coin with that error and confirms that the dies have been damaged. There're probably many others out there.

The hanging 2 confirms that dies clashed together. And the aligned lumps tell us that a hard floating object was in the striking chamber during that clash, damaging both dies in the same way.

Thanks for your comments and confirmation.

Thanks SPP-Ottawa for confirmation.

I know the 5 cents 1946 arrowhead obv/rev.
I got two of them recently at good price (with and without the die crack under the bust).

And there's a good paper on that subject in the RCNA Journal (2017)