What actions count as a suicide?

I see a count of one for my suicide stat in the career section.

I know I died several times caused by myself, falling from a high rooftop, jumping out of driving car, rolled over by my own car, bad motorcycle jump landing, parachute disappears bug, staying in exploding vehicle, leaving to lobby during running match, (not drowned yet but could also count), killing self by grenade....

But I have only a count of one for suicide in solo matches, so I wonder what actions will count for this statistic?

I think the only way to get a 'Suicide' would be to grenade yourself

• You can't shoot yourself.
• Jumping out of a vehicule that is going too fast or killing yourself by flipping your bike is 'Died by falling'
• If you kill yourself blowing up in a vehicle it will be 'killed by vehicle explosion'
• If you fall off a cliff or something like that it's 'Died by Falling'
• Dying outside the zone would be 'Killed by BlueZone'
• Dying by the redzone would be 'Killed by RedZone' (happened to me this weekend)
• Leaving the match is not suicide. The character will just stay there, unmoving, until someone or the bluezone kills it.

So with all that, my best guess would be that to get the 'Suicide' message, the only way would be to frag grenade or molotov yourself because it's the only 2 ways I can see of doing yourself damage that doesn't give you some other message.