Bomb joke

I am here at the airport waiting for my flight to Cebu.
A while ago I witnessed a checked in passenger accosted by airport security for uttering a bomb joke.
I myself heard the bomb joke that wasn't funny at all.
A companion passenger asked why their other companion went back to the check in counter.
The other passenger answered "Kasi merong bomba"
A little while a lady security approached and told the passenger he has committed a secuirty breach and that bomb jokes in airports are strictly prohibited.
The passenger turned pale and began to apologize no end.
The prohibition against uttering bomb jokes in airports must be taken seriously.