not sure if I wrote this joke right?

There is this new young construction worker who loved to brag how tough he was and often challenged people to feats of strength.

After a week the old welder spoke up and said "i bet you i can put something in that there wheelbarrow and move it 20 feet and you will have no chance to do the same"

'put your money where your mouth is' replied the young man

"one weeks pay'

"your on" says the young man

so the old man got the wheelbarrow and said "get in kid"

that was his last challange