I quess I do the same trick I did last year, because I lack originality
I ask my friend to call my other friend (bonus points if those two have not met each other) and it is going somewhat like this:
"Is this Suicidal Hotline?"
"...No, this is *"
"FUCK, I CAN'T DO ANYTHING RIGHT!"
Then play gunshot effect via computer and wait for results
Last year were pretty hilarious, I called my female friend, and after that she freaked out, went to get boyfriend and after a while, My other female friend took phone and the conversation went pretty much like this:
"Oh my god! What happened!?"
"I don't know, he just called me and asked if it was Suicidal Hotline and when I said no, he shot himself!"
"My poor friend, I should have seen this coming from miles away, He have had some suicidal intentions, but I never took him seriously, But I hope my friend Fools April can finally find peace..."
"I'm so sorr~ wait, could you repeat that name?"
"Why, did you know him? why did you not stop him!?"
"No no, I just think I did not get that name right..."
"He is called Fools April, why?"
"..."
"God fucking damn it, Tell me who the fuck made this joke and I fucking strangle him!"
At this point, I took the phone
"Hi there, did you have lovely conversation with Fools April?"
"Curse you to the depths of hell khelbel, i'm seriously gonna kill you"
Fun times