Now you see it, ... Now you don't

Trying to learn!!!
Can anybody explain what happened? and maybe the cause of this leap and drop-back on EUR/JPY today May 6 at 8:00 AM EST. I'm interested in learning the psychological activity flow behind the market and the mechanics of the events that led up to this pattern when NY opened.
Who might have bought so quickly and who sold this gradually to bring the market back to the same point it was before the jump only so start climbing back again.
Very much appreciative of the intelligent answers found on this excellent forum.

WHC's feed is shit and missed about 20m worth of data during the NY open range when ADP employment change was released so that is why you have a huge gap. ADP came out better than expected so risk aversion associated pairs like USD and JPY devalued, but looks like it was only temporary. We often see that sort of manic spikey price action following news. It goes up quick, and then comes back down just as quickly as buyers and sellers find equilibrium. ADP is just a precursor for NFP which comes out on Friday. First Friday of the month is as good a day as any to take a break from trading IMO. Looking back over my stats, two of the worst days trading I ever had were on the first Friday.

Many thanks birdt for youriluminatingexplanation, will be aware of WHC from now on. Much appreciated advice.