"Reg!" Harry came around the table fast, banging his leg into side in his hurry. "Hey-" The man was swaying, but not falling, and he was gripping his arm.
For about two seconds, normalcy tried to assert itself and Harry thought that maybe Regulus was having a heart attack. Then an old, instinctive paranoia set in, causing Harry's own heart to stop and stutter, his breathing gone heavy, and not from exertion.
He put his hand over Regulus' and looked up, searching for his eyes, for any sign that Harry might be mistaken. "Regulus?"