the Imploding Can

This is the Scientific method for a experiment we did yesterday

Aim
to Observe Contraction in Gases
Equipment
Can, Scissor tong, Bunsen burner, Heat Proof mat, tripod gauze mat, open container of cold water,
Method 

1. Set up your bunsen burner under the tripod and gauze mat. 
2. pour apox 50-60 ml of water into the can. it should be no more than 1/4 full.
3. heat the can of water until steam is escaping from the top.
4. carefully grip the can with the tongs. be sure to have a strong grip on it before lifting it off.
5. Quickly but very carefully invert the can as you plunge it into the container of cold water.

Hypothesis 

I think the can will implode. it will crumple upon itself,

Observations

the  water in the can boiled and when we tipped it into the water it imploded on itself like I thought 

Explanation 

this happened because the air pressure inside the can becomes less than that outside so it crumples in on itself when it got cooled quickly