No OH&S at home
True story time
When dad and I were building a clubman we had it sitting on a table in the garage which was on wheels donated by woolworths or Coles and we could wheel it around the garage.
As the car was only sitting on wooden blocks on the table there was only 4 inches clearance between car and table but this night we needed to do something under the car so we wheel the table over to where the chain block is.
Now the chain block is attached to an RSJ that is in the roof of the garage and we used a seat belt between the hook and the car and winch up the rear of the car.
I grab a jack stand but dad says no need it's only a two minute job, he climbs under the car does the job and crawls out.
The very second he is clear of the car the seat belt breaks and the car comes crashing down onto the table.
We ALWAYS used jack stands after that so maybe OH&S should be applied with vigilance in a home garage