Why are Chernobyl kids smart? Two heads are better than one.
Are you making a joke out of the Chernobyl tragedy?
Yea, you have to admit it, it's pretty funny.
A lot of people got sick and died because of that event. It can be very hurtful to other people to make light of those injuries and deaths.
I'm just trying to see the bright side. Maybe they could also invent a cure for cancer.
I appreciate that you want to lift people's spirits, but jokes about a tragedy can come off as callous and can make people upset. You should consider the audience before you tell these jokes again and think about how they might react.