Recently I was playing a 2D ASM game when the floor person loudly called “shuffle-up” to the dealer. It occurred at a time when several players were on a hot winning streak. I had also seen my $100 buy-in grow to over $400 rather quickly. Could a player have been suspected of card counting? Is this an example of heat? I did not notice anyone spreading aggressively. Are there other reasons a dealer would be instructed to re-shuffle half way through the deal?