I just caught a blooper in Enos Strate to the Top. When Enos says "That's them!" And chases the bank robbers, he's wearing his uniform jacket. When the crooks jump and land in the quicksand bog, his uniform jacket is off. When he gets out, and walks over the hood of his car to warn them "Quicksand!" And flips the sign around for them to see, he's wearing his uniform jacket again.
If I'm watching a full episode, I don't always pay full attention. I tend to notice mistakes/bloopers when I'm getting screengrabs. This is partly because I'm paying much closer attention, and partly because I'm looking at a laptop screen next to me rather than a TV screen across the room.