There seems to be some debate on this thread concerning if it is advisable to get under a car using a scissor jack and blocks.
For the record many people have been crushed and even killed doing what the pictures show you doing.
Scissor jacks are very suspect in terms of stability and should only be used to change a flat if there is nothing else available.
Blocks also tend to give way once the car falls off the jack.
The fact that the engine is in the back should mean that you will only get crushed a bit if the car does fall on you and hopefully there will be someone there to help you get out or call 911.
It can be quite nasty to be stuck under a car for days on end, starving and bleeding to death.
It’s a very stupid thing to do. Don’t do it again.
Please get the correct tools for the job.
I commend you for working on your own car but do it safely.
Regards,
Patrick