Formally saying that you are laughing without euphemisms or colloquialism without referring to yourself

Question

I want to know how one can manage to assert that they are laughing without using euphemisms or colloquialism in first person, for example in a letter, without referring to yourself, that is saying "me" or "I". These examples seem impossible:

• The chicken wanted to cross the road because it wanted to reach the other side. Haha!
• The chicken wanted to cross the road because it wanted to reach the other side. LOLZ.
• The chicken wanted to cross the road because it wanted to reach the other side. :-P
• The chicken wanted to cross the road because it wanted to reach the other side. (laughing with mouth foolishly open and smells bad breath)

Side-note: Please pardon that poor humor I have taken as an example.

Answer 1

I am not sure if there are better alternatives but 'Ha ha!', 'Lolz', 'Rofl' etc., are the most common ways to show in an informal written dialogue or conversation that you are laughing without mentioning it explicitly. Of course, terms like 'Lolz' and 'Rofl' evolved thanks to the Internet usage but they have become quite a trend.

Your question, however, – 'how one can manage to assert that they are laughing without using euphemisms or colloquialism in first person', might be answered with a simple phrase like 'that makes me laugh' as Robusto suggests in the comments above.

Edit:

If this is what you are looking for (as I tried in my comment below) –

1) It's difficult not to laugh but the chicken wanted to cross the road because...
2) It's hard not to laugh but the chicken wanted to cross the road because...
3) Can't help laughing but the chicken wanted to cross the road because...

Answer 2

You can certainly do it if you put your "indicator" before the thing that makes you laugh...

Amusingly, I can't think of a suitable witticism to follow my answer word!

Answer 3

You could express your laughing reaction to the joke in one of the following ways (roughly ordered from most formal to most casual):

He/the comedian said "The chicken wanted to cross the road because it wanted to reach the other side" and I laughed (a lot).

He/the comedian said "The chicken wanted to cross the road because it wanted to reach the other side" and I laughed until I cried.

He/the comedian said "The chicken wanted to cross the road because it wanted to reach the other side" and I (almost) killed myself/died/wet myself laughing.

He/the comedian said "The chicken wanted to cross the road because it wanted to reach the other side" and I almost peed myself/my pants laughing.

He/the comedian said "The chicken wanted to cross the road because it wanted to reach the other side" and I laughed my ass off. (The SMS/text acronym is LMAO)

He/the comedian said "The chicken wanted to cross the road because it wanted to reach the other side" and I almost bust a gut.

Answer 4

Without referring directly to oneself, it is possible to suggest that a state of amusement follows the statement:

• The chicken wanted to cross the road because it wanted to reach the other side. Cue laughter...
• The chicken approached the road wanting to reach the other side - with hilarious consequences!