Last month, Boko Haram burned down Buratai's house (he wasn't home). Yesterday, they attacked his convoy. Ten of the attackers were killed and five captured; one Nigerian soldier was killed.
Since losing control of most of the territory Boko Haram held at the start of the year (at that time it was the size of Belgium), the terrorist group has resorted to hit and run tactics.
If Boko Haram hates Buratai that much, I figure he must be doing a pretty good job. It's a good sign that he is always on the ground, rather than hiding out in the capital, which is what Jonathan's military chiefs were apparently doing. This article says that in yesterday's attack, "soldiers led personally by Buratai returned fire, killing five Boko Haram members at the spot." Rambo couldn't have done better.