The toilet was designed specifically to deal with crap. But even a toilet can get overwhelmed. When a toilet gets more crap than it can handle it simply won't take any more crap. It backs up, and so do you.
Has anyone seen the reddit poopknife rant?
Also, are you okay?
 ScientistV
                                                
                                                Level 7
                                                Apr 21, 2018
                                            
                                                
                                                    ScientistV
                                                
                                                Level 7
                                                Apr 21, 2018                                            
                                        It happens in my bathroom with 8 people using it.
 sassygirl3869
                                                
                                                Level 9
                                                Apr 19, 2018
                                            
                                                
                                                    sassygirl3869
                                                
                                                Level 9
                                                Apr 19, 2018