And if you left them down during storage and forgot about them, hooked up and tried to drive off, that would be interesting!
During my dealer demo, the person giving me the walk through did just that. He had the stabilizers down. My wife, myself, and the dealer rep were talking and doing the demo "thing". When it was all over, he began to pull the camper (with this nifty electric trolly that attached to the trailers tongue) and tried to pull it forward. After a loud scrapping sound, he quickly realized he had left the stabilizers down.
He bent one of them, and they had to replace the right side leg; they had the part in stock! Makes me think this was not the first time this happened.
2005 Jayco GreyHawk Class C
2007 Ford F150