Gallows humour?

I'm not much good at telling jokes, tending to seize up half-way through, when I suddenly realise I've forgotten the punch line. Am I any better at transcribing them? A vous de juger!

***

Whilst playing with a rifle, a man accidentally shoots his wife. In a panic, he phones up his best friend. "Something terrible has happened", he screams down the phone. "I think I may have killed my wife".
""Keep calm", his friend says. "First go back and check to see if she is dead". He waits on the phone while his friend goes back. After a while, he hears a loud bang and then his friend comes back on the phone.
"OK", he says, "I've done that. Now what do I do?" (as told to me by David Ross)

***

A man goes into a chemist's.

"I'd like to buy some arsenic"

"Who's it for, Sir?"

"It's for my mother-in-law"

"Have you got a prescription?"

"No, but I've got a photo"

***

Lastly, a joke that was apparently going the rounds in "informed circles" earlier in the year.

Q. Whats the difference between Iceland and Ireland?

A. One letter and about six months.

In bad taste, I know, given the misery afflicting both countries. But what else can you do but laugh? We're next anyway.