For anyone on Twitter Friday afternoon, it was impossible to miss: New Jersey Gov. Chris Christie endorsed Donald Trump for president.

Social media lit up with reaction, including a fair amount of criticism, to the Republican governor's endorsement of his former rival. Political observers, other figures and everyday citizens all weighed on the news. Twitter was buzzing with a mix of speculation about whether Christie, who dropped out of the presidential race earlier this month, was angling for a vice presidential or cabinet nod, comments on the outsize personalities of both men and jokes about the George Washington Bridge lane closure scandal, with some smart analysis mixed in.