When a person let's say his name is "Dante" fell on the floor everyone felt that

Phrase used to add emphesis which is said after making a statement.

When one lays a brown egg in their pantaloons having basked in the pleasing pressure of an impending bowel movement too long.

confessing love to someone and than finding out they lied to you

Describes a person who claims to be a cyclist and uses that fact along with claims of their vast experience in the activity to claim they have credibility in discussions about bicycling safety. They tend to suffer from an extreme cases of Dunning-Kruger syndrome and Cycling Inferiority Syndrome and are often arrogant anti-car proponents who wish to use cycling to impose their way of life on others.

It actually turns out they seldom know much - not even the most common types of bicycle crashes and how to prevent them or about the complexities of transportation planning and engineering.

With this lack of knowledge, they often find themselves victims of close calls or misunderstanding how the the transportation system works. For every year of cycling they get away with without something happening to them allows them to boast their arrogance and claim that the way they do things is the "safest" or "best" way to do things. This often is contrary to the actual expert advice. Engaging with these people is often frustrating due to their inability to read and make logic, rational arguments.

When you are gay and you see a cute girl/boy. Or someone straight tries too flirt with you.

Yes. Yes It is. Make her smile as much as you want.