Following a four and a half hour terror panic, which saw part of a major motorway shut down and more than 40 police deployed but ultimately ending with no arrests, tweeters have been speculating as to what a Megabus passenger was so concerned about she rang the authorities.
Scores of police and a bomb disposal unit descended on the Megabus carrying 48 passengers on Thursday morning, after reports a man was seen pouring liquid into a smoking bag on board the coach but police have said it was not a chemical incident.
See a selection of the best tweets below.