T ach in inae ▁Category : D ip tera ▁of ▁Europe ▁Category : In sect s ▁described ▁in ▁ 1 8 2 0 <0x0A> </s> ▁In ▁American ▁football , ▁a ▁trap ▁play , ▁or ▁trap ▁run , ▁is ▁a ▁run ▁consisting ▁of ▁a ▁def ender ▁on ▁the ▁line ▁of ▁sc rim m age ▁( e ither ▁a ▁def ensive ▁tack le ▁or ▁def ensive ▁end ) ▁getting ▁trap ▁blocked ▁by ▁an ▁off ensive ▁lin eman ▁or ▁back ▁from ▁the ▁opposite ▁( other ▁side ▁of ▁the ▁center ) ▁side ▁of ▁the ▁ball . ▁The ▁play ▁is ▁known ▁as ▁a ▁" t rap " ▁because ▁the ▁strong ▁side ▁off ensive ▁lin eman ▁will ▁" block ▁down " ▁on ▁a ▁line back er , ▁seem ingly ▁leaving ▁a ▁def ensive ▁lin eman ▁un block ed . ▁ ▁As ▁the ▁def ensive ▁lin eman ▁comes ▁through ▁the ▁seem ingly ▁open ▁gap / hole , ▁he ▁is ▁" tra pped " ▁by ▁the ▁weak ▁side ▁( also ▁known ▁as ▁back side ) ▁guard ▁who ▁blocks ▁the ▁def ensive ▁lin eman ' s ▁blind side . ▁▁▁ ▁Occ asion ally , ▁a ▁trap ▁block ▁will ▁come ▁from ▁a ▁tight ▁end . ▁ ▁T rap ▁blocks ▁by ▁tight ▁ends ▁are ▁known ▁as ▁" wh am " ▁blocks . ▁ ▁Typ ically , ▁flow ▁will ▁start ▁out ▁one ▁way ▁( right ▁or ▁left ) ▁and ▁the ▁back ▁will ▁receive ▁the ▁ball ▁going ▁away ▁from ▁flow ▁where ▁the ▁trap ▁is ▁taking ▁place . ▁ ▁History ▁Pop ▁Warner ▁is ▁cred ited ▁with ▁invent