I've seen Mei's Ice Wall get destroyed when they use it in front of the cart, the cart just smashes through the middle, leaving a pillar of ice on each side left standing.
And that got me wondering, is there any way players can destroy an enemy Mei's wall prematurely?
Best Answer
Yes. According to personal experience and Furious Paul's Overwatch Strategy Guide, where it says:
meaning, that they can be destroyed. Alternatively, they also get destroyed after either
The Mei that placed them cancels them
or
after 4.5 seconds.
And it also says that: