After the car plunges into the canal, Anwar is dripping wet like everyone else in the next shot. However, he wasn't even in the car at the time.
When Sid and Tony are at the restaurant waiting for Michelle, the sauce on Sid's chin keeps changing and vanishing.
At one point Sid's phone is depicted as an LG phone, clearly shown on screen for several seconds. However, when he turns it back on later in the episode, it plays the Nokia tune.
At the party, Tony's socks are white. However they are black later, as he walks along the road drenched. At no point did he change them.
During the party, Cassie's eye shadow changes color. It starts off as a pale green, but on the trampoline it is a pale purple. It later returns to being green again.