Monday and a hellish morning on the bus

Have u ever tried to push urself into an overloaded bus in during the morning rush hours? Well, I have. I have been reshaped by the crowd on such a bus every morning of during the weekdays. I never believed knew how flexible the human body could be like this before until i started commuting by bus. (I never believed the human body could be so flexible until....I never knew the human body could be so flexible before I started...) Actually, now I don't even know why people spend so much money in gyms to keep fit, all they need is to simply ride a bus in the morning. U'll have to use every piece of ur mucsles You have to use every muscle to get urself enough space for breathing, standing and to avoid tumbling when the bus changes its speed or turns.
Usually it's quite an exercise and makes u feel like a fighter. But things can be much worse on monday mornings. Just like this morning.  ...monday mornings, just like this one. When the bus arrived this morning, it was not overloaded anymore. It was , but overfilled! (what is your meaning here? Overloaded=overfilled, I fixed the grammar, but the meaning is still strange.... "not overloaded, but overfilled" doesn't make sense.....maybe you may want to say "it was overloaded more than usual") It was ridiculous that a bus could contain so many people and still move, and I even thought it was going to explode the next second. ("...at any second" is better)
I would love to step back and wait for the next bus if i could. (Tense problem, as it stands it is present tense, to change it to past use "would have loved to....if I could have") But i was standing right between the open door and a dozen people trying to get on the bus recklessly. Thus I was forced forewards and magically got inside the door with only half of my left foot on the 2nd step only, and the worst was yet to come——the door closed. I felt like it squeezed the last breath out of my chest and i had to turn my head as hard as possible trying not to bury my face into the butt of someone standing on the upper stair.LOL! And the girl behind me was pushing my waist, probably to get herself some air. Standing on my tiptoes, wrenching my neck, every minutes on the bus was a real torture. I suffered for over 40 minutes till I finally got the chance to get off the bus, totally exhausted with my legs cramping, I had and used up all the my energy for the whole day. The only comfort was that I should be very lucky for the following days as a compensation for this nightmare on this hellish morning bus. Very well written....and funny!