The tag laser appears in these 5 comics:

• 18: (4/21/2012) Out, damned spot! (Tags: mike, laser, chris, ashley, lab)
• 19: (4/28/2012) Peter Dustytail (Tags: dust-bunny, laser)
• 22: (5/19/2012) Cinnabar Island, Oklahoma (Tags: mike, laser, pokemon)
• 85: (08/03/2013) 699 (Tags: laser)
• 223: (03/26/2016) Mode Hop (Tags: laser)