Yeah, okay, Alonso. You were a "second late," and you had no time to pull up, right? He knew what he was doing. Alonso saw Flacco giving himself up, and still lunged at the Ravens quarterback to get the hit on him. That is a textbook dirty hit.
The NFL is a fast league. There are literally split seconds to make decisions that could mean a win or a loss. Flacco started his slide early, and Alonso looked like he was already in the process of make the tackle. There was no way he could've pulled up or adjusted his pad level to make it a legal hit. Flacco was unlucky, and Alonso's hit wasn't dirty.