Actually, I went back to check the 5 year chart and today is the second highest volume of all time.

The number highest volume day was recorded on November 5th 2012 with 5.3 Million shares traded (That's approximately 133 Million shares pre-split). But today is a strong second place (approximately 128 Million shares pre-split).

We all know what happened after November 5th 2012, the stock ran for approximately 200x that pps within 7 months.