In other words -- and I think you see where this is going -- no reason to live.  Of course it's meant to be funny, but in all seriousness, suicidal ideation is quite common with traumatic brain injuries.
言い換えると 生きている意味がない ような状態です 面白おかしく 話していますが 真面目な話 脳の外傷が 自殺願望に繋がることは よくあるんです