Or somebody wants you to think that...
I would usually bet that it's a fake wall to make you buy from the very same person who fakes the buy order but doesn't really plan on buying any more
The problem is you can't fake a 112BTC buy wall on cryptsy (at least there is no evidence that you can). If you place a buy order you are risking that it get filled in one trade. There is no way (unless you have inside access to cryptsy servers) to withdraw a buy order between the time that someone tries to sell to the order and the time that the order completes.
This exact scenario was the subject of a recent 60 minutes episode, and book "flash boys". The book describes how high frequency traders were able to place huge buy walls, then intercept incoming large sell orders milliseconds before they hit the exchange. By moving the buy wall back a fraction of a second before the sell order arrived at the exchange they were able to make billions of USD. They were only able to do this though with hundreds of millions of dollars invested into infrastructure in/around NYC.
Ultimately only someone with inside access to the Cryptsy servers would be able to set up fake buy walls in this manner, and there is no evidence that this has ever happened.